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

Question

blagie [28]

3 years ago

12

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

s. What is the number of science books?

Mathematics

1 answer:

Morgarella [4.7K] · Answer 1 · 2022-08-25T11:25:38+03:00

Morgarella [4.7K]3 years ago

7 0

Answer:

$Number\ of\ science\ books=7$

Step-by-step explanation:

$Let\ number\ of\ science\ books=x\\\\Story\ books=18\\\\2\times science\ books+4=Story\ books\\\\2x+4=18\\\\Subtract\ 4\ from\ both\ the\ sides\\\\2x+4-4=18-4\\\\2x=14\\\\Divide\ both\ sides\ by\ 2\\\\\frac{2x}{2}=\frac{14}{2}\\\\x=7\\\\Number\ of\ science\ books=7$