Question

Brian goes to the bookstore to buy some books . He has $65. He wants to have at least $15 left after purchasing his books which cost $8 . Write an inequality to represent the situation . ( please tell me how you got the answer ) .

Answer 1

`8x+15`≤
`65`

`x=(25)/(4)`

Explanation:

let the number of books purchased = x

cost of each book = $8

Cost incurred on books = 8x

money to be saved for miscellaneous expenses= $15

Total cost = 8x+15

We are given that total cost need to be less than or equal to $65

Hence

8x+15≤65

subtracting 15 from both sides

8x≤50

diving both sides by 8

`(8x)/(8)=(50)/(8)`

`x=(25)/(4)`