5.8-2.8 = 3,2, let this book be X yuan.

(x-2.6)+(x-3.2)=x+2.8

x+x-x=2.8+2.6+3.2

X = 8.6,2, two primary school mathematics inscriptions: simple equations and formulas can solve problems in grade five!

First question

Wang Hua and Li Ming buy books together. Wang Hua took out all his money, worse than 2.6 yuan, and Li Ming took out all his money, worse than 3.2 yuan. If they combine their money to buy the book, but 2.8 yuan is added, how much is the book?

the second question

Party A and Party B start from A and B at the same time, and the speed of Party A is 12km. After they met, B walked 36 kilometers to A, A walked 2.5 poems to B .. How many kilometers does B drive per hour?

Thank you for your trouble. ...