You earn $56 for washing 8 cars.
First find out how much you earn washing one car. Divide 56 with 8
56/8 = 7
You earn $7 for washing 1 car.
Now find out how much you earn washing 5 cars.
7/1 (being $7 per 1 car)
5/5 (amount of cars washed)
7/1 x 5/5 = 35/5
For 5 cars, you earn $35.
$35 is your answer
hope this helps