When she entered the city, the rain had stopped, and Xu Xiang originally planned to send Xiao Xueying back to Xiao Mansion, but she seemed to be very interested in everything about Xu Xiang, and asked to follow her back to Xu Mansion for dinner.

Xu Xiang thought that it would be nothing to eat, so he agreed.

After returning to Xu's mansion, the subordinate greeted him, Xu Xiang handed the coat that was already a little wet to the subordinate and asked, "Is the young lady back?" ”

"If you go back to the young master, the young lady has already returned home."

"Well, you take Miss Ying'er to the guest room to rest first." Xu Xiang commanded, and then said to Xiao Xueying: "Miss Ying'er, you go to the guest room to rest first, and I'll ask someone to prepare dinner." ”

"Okay!" Xiao Xueying was still carrying her wooden box, smiling and following the next person to the guest room.

Xu Xiang went to the east wing to find Jiang Shenyu, and the people he met along the way greeted him respectfully.

At this time, Jiang Shenyu was in his room, concentrating on drawing on paper with a brush, and he quietly walked in.

Qing'er on the side saw him and was about to speak, but was stopped by a silent gesture from him.

He walked over gently, hugged her from behind, and asked softly, "What are you doing?" ”

Jiang Shenyu was originally writing and painting seriously, but he was suddenly hugged by someone, and subconsciously planned to fall over the shoulder, but when he heard this familiar voice, he didn't move.

"It's you." She looked up and said with a slight smile, "I'm calculating, Aunt Wang reported to me today, saying that she bought some plain satin and green satin today, originally planning to make new clothes for the people in the house, and I want to see which one is more cost-effective." ”

"Oh? So which is the more cost-effective? Xu Xiang smelled the faint fragrance emanating from her body and asked intoxicatedly.

"One horse of plain satin can make the clothes of four adults and two children, and one horse of green satin can make the clothes of three adults and three children. In terms of price, they are 28 big money and 27 yuan. I thought that these fabrics were very good-looking, but I didn't know how to choose the most suitable one. ”

Xu Xiang smiled slightly and said, "That's very simple, you just calculate how much fabric each adult and child uses!" Then use how many adults and how many children we have in our house to calculate, doesn't this come to the most cost-effective one? ”

"But...... I can't figure it out! Jiang Shenyu said embarrassedly.

"Haha...... It's very simple, I'll teach you! Xu Xiang found a place to sit down, this is a very simple system of binary equations, just calculate them separately.

"Let's say I make an adult with a cloth of x and a child with a fabric." Xu Xiang wrote an X on the paper and a Y on the side, and began to speak.

"Aike..... Die? Crooked? Jiang Shenyu looked at the English letters on the paper, looking confused.

"It's just a pronunciation, it's a code name, you don't have to worry about it!" Xu Xiang didn't explain why he used this code name, and continued, "If you use plain satin, four adults, that is, 4x, and two children are 2y, and 4x+2y is equal to 28 big money." In the case of green satin, three adults are 3x, three children are 3y, and 3x+3y is equal to 27 big money. ”

"This forms a system of binary equations."

"Binary Linear Equations?" Jiang Shenyu was still at a loss.

"If you look at the use of green satin, three adults and three children use one horse, which is 27 big money, that is, one adult and one child are 9 big money, right?" Xu Xiang explained.

Jiang Shenyu nodded as if he didn't understand.

"And with plain satin, four adults and two children use one horse, which is 28 dollars. In other words, two adults and one child are 14 big money! ”

"After simplifying the two equations, we switch the adults to the other side, that is, the fabric spent by a child on plain forging is equal to 14 big dollars minus the cost of two adults, and the cost of cloth with green satin is equal to 9 big dollars minus the fabric used by one adult."

"It doesn't matter if it's green satin or plain satin, the fabric used to make clothes is the same. That is to say, 14 minus 2x is equal to 9 minus x, so that we get x, that is, the fabric spent by an adult is 5 big money, and the fabric used by a child is 4 big money. ”

"There are nineteen adults and eleven children in our house. If you calculate it, it will cost a total of one hundred and thirty-nine dollars, and to sum up, we will buy four horses of plain satin for one hundred and twelve dollars, and one horse of green satin for twenty-seven dollars, adding up to just one hundred and thirty-nine, no more, no less! Xu Xiang threw the brush on the table.

Jiang Shenyu looked at these things drawn on the paper, she seemed to understand it, but she felt very powerful.

"Changsha, you are amazing! This binary equation is also very powerful! Her eyes flashed adoringly.

"It's hard for you." Xu Xiang said with some distress, these things were just a little money, but who told them that they were very poor now, I really wanted to break a big sum in half to spend it.

"It's okay, husband, you have hills and valleys in your heart, and Shenyu is willing to share these chores for you. Besides, don't I enjoy it? Jiang Shenyu said.

Xu Xiang gently held her in his arms, if he has a wife like this, what more can a husband ask for!

Qing'er was on the side, not leaving, not staying, slightly embarrassed. Xu Xiang said, "Qing'er, go cook!" ”

"Yes! Master! Qing'er blushed and walked out of the house.

"Oh! By the way, there are guests at home, do more. Xu Xiang stopped her again and said.

"A guest at home?" Jiang Shenyu asked.

"Well, Xiao Man's sister. I insist on coming to our house to eat......"

Then, he told Jiang Shenyu in detail about the assassin he had encountered today.

When she heard that she had met the assassin today, she was very nervous, but fortunately, Xiao Xueying took action and saved his life, which made her feel a little relieved.

"Listening to what you say, this Miss Xiao is an interesting person."

"Well, I don't know where her strength came from, she looks weak, but she can wield such a big knife." Xu Xiang thought of the big knife again, and his heart was full of admiration.

"Then when we have dinner, I'll entertain Miss Xiao well."

"Hmm."

Xuanyuan has gone back, but he has not come back for the time being, and Zhai Ling'er has not woken up for the time being.

However, before eating, Xu Xiang still went to take a look, and Ge Qingsong said that the poison on Zhai Ling'er's body was inexplicably solved, and she would be able to wake up tomorrow.

Ge Qingsong couldn't find a reason, so he could only identify it as Zhai Ling'er's own good physique, so he didn't think much about it.

"Xu Changsha, is this your wife? Why don't you introduce it? Seeing Jiang Shenyu's first face, Xiao Xueying still looked like she was self-cooked, and asked with a big grin.

"I almost forgot to introduce you, this is my wife, Jiang Xiaoyu. Madam, this is the Xiao Xueying Xiao girl I mentioned to you!

"Thank you Miss Xiao on the street today for saving Changsha's life! Xiaoyu is very grateful! Jiang Shenyu owed Xiao Xueying slightly, and then took out a small wooden box from his arms, "I don't know what the girl likes, I have a pair of jade pendants here, and I should be grateful to Miss Xiao for saving her life in Changsha." ”

Xiao Xueying didn't even look at it, waved her hand and said: "I have always disliked things like jewelry, Xu Changsha has already said words of gratitude, and Sister Xiaoyu doesn't have to be polite." ”

Jiang Shenyu held the wooden box, looking a little embarrassed, she didn't expect Xiao Xueying's personality to be completely different from ordinary women. It is a woman's nature to love beauty, but she doesn't seem to have it at all.

"Since Miss Ying'er doesn't like it, you can take it back." Xu Xiang said to Jiang Shenyu that through today's relationship, he found that Xiao Xueying was not interested in ordinary things at all, but had a great interest in those strange things.

The meal was served, Xu Xiang invited Xiao Xueying to sit down, and let Tiantian and Qing'er come to the table, and the five of them began to eat dinner.

When a few people were eating harmoniously, chatting, and having fun, suddenly a voice came from outside, "You don't call me if you have food!" ”

A few people followed the sound and looked out the door, and it turned out to be Luo Min, who had disappeared for a long time.

"Miss Luo? You're back? Xu Xiang got up and walked over. Let's have a meal together! ”

Luo Min was not polite at all, walked straight to the dining table, picked up a pair of chopsticks, sandwiched the meat, and ate it happily, chattering while eating: "Xu Changsha, you don't know, what kind of life I have lived for more than a month!" ”

"Alas, not eating well! I didn't sleep well either! I miss your fried chicken and the warm and soft quilt at home. ”

"Huh? Miss Luo, didn't you go back to Luofu? Xu Xiang asked in surprise, although he didn't know where Luo Min went, but a person who had gone far away, shouldn't he go home as soon as he came back? What does it mean to run to yourself?

"What are you going back for? I'm here to find you something! ”

"If you're looking for me, won't it be ....... You're here to eat, right? Xu Xiang looked at her terrifying appearance of constantly stuffing vegetables into her mouth, as if she had been hungry for half a month.

"I'll tell you separately later, you let me eat a full meal first!" Luo Min didn't say it directly, after all, there are many people here, and this matter is very important, so naturally he can't say it like this.

In a corner of the living room, Lin Fuhang looked at Luo Min, who was feasting, and secretly thought in his heart: "Why did Luo Min suddenly return to Ningdu?" She didn't go to the Great Xia Longque Yamen for the first time when she came back, why did she come here? ”

At this moment, Luo Min pulled the chicken bone out of his mouth and threw it in the direction where Lin Fu was hanging.

Lin Fuhang reacted, slightly sideways his face, chicken bones rubbing his face, and nailed heavily to the wall behind him.

"If you want to listen, come out and listen openly, what's the point of sneaking in the corner and eavesdropping?" Luo Min said coldly as he looked in his hidden direction.

Xu Xiang looked at Lin Fuhang who slowly walked out of the corner with a surprised face, he asked Lin Fuhang to come over for dinner before, but the latter refused because he wanted to pranayama, but now he suddenly appeared here, what is going on?

Are you hungry?

"Xu Changsha, who is he?" Luo Min saw that Xu Xiang was only slightly surprised, and did not react too much, so he guessed that it might be someone he knew.

"This is Lin Fuhang, the fifth brother of the warden Lin Siwei." Xu Xiang said, "Lin Fuhang, are you hungry, come and eat together?" ”

Since he had been found hiding beside him, in order not to be suspicious, Lin Fuhang hurriedly said: "I'm sorry, Xu Gongzi, I'm a little hungry, so I thought about getting some food, but seeing that you have already started eating, it's not good to disturb ......"

Luo Min looked at him coldly, as if his words had not dispelled the suspicion in her heart.

"People from the Lin family? How did the people of the Lin family get to your house? ”

"Uh......" Xu Xiang didn't know how to explain, could it be that he said that it was because Lin Chong saw that he was domineering, so he not only gave himself 50,000 food, but also sent a bodyguard to himself?

"Get out! Don't let me see you Lin family people in Xu Mansion in the future! Luo Min seemed to be a little disgusted with the Lin family, and said coldly to Lin Fuhang.

"Oh, Miss Luo, let's not play like this! Lin Fuhang is my guest, and you are not someone from my Xu Mansion, he came to my Xu Mansion as a guest, why do you care so much? Xu Xiang said a little unhappily, after all, Lin Fuhang was desperate to protect himself, and Lin Chong was so kind to himself, he didn't see anything unfavorable to him at present, and he wanted to drive people away, and I, the master, didn't speak, what do you mean?

"Are you leaving?" Luo Min stood up suddenly.