Question

The equation 9+12m=6+15(m-1) models the following situation: Movie-rental company A charges a sign-up fee of $9 plus $12 per month, and company B charges $6 for the first month plus $15 per month after that. At a certain number of months, the cost of the two companies is equal. Which equation is a simplified version of the one above?

Answer 1

After 1 month the cost will be equal for both companies

9+12m=6+15m

9=6+3m

3=3m

1=m 9+12*1 = 6+15*1 9+12=21 6+15=21

Answer 2

THE ANSWER FOR THIS QUESTION IS 3m=18