2。 6(x+5)=36
3。 5(9x+6)- 18=9( 10x-2)
4。 3x+6=( 18-6)x
5。 7x=(50- 1)x-49x
Second, 1. How many children share apples? Two are more than six, and three are less than two. How many children are there?
2。 There are a batch of new books in the library. It is understood that there are three kinds of books in this batch, namely popular science, art and music. There are 5 more popular science books than art books, 5 fewer art books than music books 1 book, and 47 popular science books. How many books are there in this batch?
3。 When calculating a two-digit number, Xiao Ming regards 3 of its ten digits as 8 and 6 of its single digits as 9. When calculating with another number, he found that when this two-digit number is divided by this single digit number, the quotient is greater than 2 and 4. What is this single digit?
4。 Xiaohong is not mistaken about the two-digit number with the same conditions as the above question. The number obtained by subtracting it from a number is 7 times that of 6, which is greater than 3. What's this number?
5。 A two-digit number, Xiaoyue switches the ten digits with the single digits, adds another number to get 75, and divides it by this number to get 5.25. What is this two-digit number?
6。 Xiao Zhao and Xiao Li drive from City A to City B on business at the same time. Halfway through, Xiao Zhao suddenly remembered that he didn't bring an important document, so he went back and took 15 minutes to get it. Then he sped up and arrived half an hour later than Xiao Li. As we all know, the speed in Xiao Zhao is 20 kilometers per hour, and Xiao Li is 2 kilometers slower than Xiao Zhao. How many kilometers is it between AB and the city?
7。 Still the same question, what is the speed of Xiao Zhao after acceleration?
8。 Xiao Gan and Sun Xiao set out from A and B respectively. Xiao Gan is 2 kilometers slower than Sun Xiao every hour. They met five hours later. How many kilometers are there between AB?
9。 Xiao Hu borrows books from the library. It is understood that he borrowed two kinds of books, namely music and travel. Music is twice as much as traveling, while traveling is three times as much as music. How many books did Xiao Hu borrow?
10。 Pony goes shopping in the supermarket. Ballpoint pens cost twice as much as pencils, less than 50 cents. The price of a pen is more than four times that of a ballpoint pen. In 2 yuan, a pencil costs 20 cents more than a 4-cent eraser. Finally, he bought two pens, an eraser and three pencils, and paid with the supermarket membership card, so he could enjoy a 60% discount. How much did the pony cost?