Question

Andrew pays a monthly membership fee of $10 at his gym. Each time he uses the gym, he pays $5. Last month, Andrew spent a total of $65 for membership and gym use. If the equation 10+5x=65 models the situation, how many times did he use the gym last month?
11
12
13
15

Answer 1

Subtract 10 from both sides of the equation to get:
5x=55
then, divide both sides by 5 to get:
x=11
so he used the gym 11 times last month

Answer 2

11, because 65-10 is 55.    55 divided by 5 is 11