Question

Hannah wants to buy a $540 camera. She can save $40 each week from her paycheck. However, before
Hannah can buy the camera, she must give her brother $60 that she owes him. For how many weeks will
Hannah need to save before she can pay back her brother and buy the camera?

Answer 1

Suppose she saves for n weeks at $40 each week. If she starts with zero $, the minimum value of n is determined from

 

($40)n - $60 = $540

 

Solve for n.

$n = \frac{(540 + 60)}{40} = 15$

 

 

She must save for a minimum of 15 weeks.