what would my equation be

Question

For All tubes of watercolor paint at an art supply store have the same price. An artist has a coupon for $0.50 off each tube of paint she buys. She buys 6 tubes of paint and pays a total of $84.30 after the coupon is applied. Write an equation to find r, the regular price of each tube of paint

Answer 1

6r - 6(.50) = 84.30

 

6 times r is the regular price and 6 times .50 is the amount they took off to arrive at a total of 84.30.