You want to buy a mixture of Reese's Peanut Butter Cups and Snickers bars for Halloween. You ask the sales person at the counter how much each costs, and he tells you that you can buy 7 peanut butter cups and 3 snickers for 9.25, or you can buy 3 peanut butter cups and 8 snickers for 13.70. How much do each candy cost?

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.