Question

Which expression has a solution of 56, if r = 8?

6r
7r
8r
9r

Answer 1

7r, because 7(8)=56 and the other answers either go too low or too high above the goal

6r=48
8r=64
9r=72

Answer 2

r would be equal to 7 because 7 times 8 would be 56 and all you do is plug in the number to the letter .