Question

A school plans the weekly reading activities. They have 18 storys books, which is 4 books more than 2 times that of science books. What is the number of science books?

Answer 1

`Number\ of\ science\ books=7`

Explanation:

`Let\ number\ of\ science\ books=x\\\\Story\ books=18\\\\2* science\ books+4=Story\ books\\\\2x+4=18\\\\Subtract\ 4\ from\ both\ the\ sides\\\\2x+4-4=18-4\\\\2x=14\\\\Divide\ both\ sides\ by\ 2\\\\(2x)/(2)=(14)/(2)\\\\x=7\\\\Number\ of\ science\ books=7`