A customer buys a cd for $15 and a video game. The customer pays a total of $42. 80 for the two items, which includes 7% sales tax. Which equation can be used to find x, the cost of the video game before tax? 0. 07 (15 + x) = 42. 80 0. 07 (42. 8 minus 15) = x 1. 07 (15 + x) = 42. 80 1. 07 (42. 8 minus 15) = x