Question

Mary bought 10 notebooks that each cost the same amount. She paid with a $100 bill and receive $13 dollars in change a. Write an equation that can be used to find x, the cost of each notebook. b . Solve the equation

Answer 1

`(100-13)/(x)`

Explanation:

$100 - $13 = $87

87 / x =
`(87)/(x)`

Chow,...!

Answer 2

• 10x = 100 - 13
• $8.70

Explanation:

The equation would be:

• 10x = 100 - 13

Solving to get the cost of each notebook:

• 10x = 87
• x = 87/10
• x = 8.7