Question

lena wants to buy a computer that costs $900 dollars. she already. has $473 dollars saved. her grandmother will pay her $7 an hour to help her with the yard work. how many hours will lena need to work before she can afford to buy the computer

Answer 1

If you would like to know how many hours will Lena need to work before she can afford to buy the computer, you can calculate this using the following steps:

$900 - $473 = $427

$427 / $7 = 61 hours of yard work

Result: Lena will need to work 61 hours before she can afford to buy the computer.

Answer 2

Cost of the computer that Lena wants to buy = 900
Amount of money saved by Lena = $473
Amount per hour paid by Lena's grandmother = $7
Let us assume the number of hours Lena have to work = x
Then
473 + 7x = 900
7x = 900 - 473
7x = 427
x = 427/7
  = 61
So Lena has to work 61 hours before she can afford top buy the computer.I hope the procedure is clear enough for you to understand.