Question

Grace earns $7 for each car she washes.She always saves $25 of her weekly earnings.This week, she wants to have at least $65 in spending money. At least how many car must she wash?

Answer 1

so, you have to find how much total she wants in total then divide by 7.
65+25=90
90/7=11r3

Answer 2

and since you can't wash 3/7 of a car you must wash one more. So, 12 cars.