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Home > AC > Chapter 7 > Lesson 7.3.4 > Problem 7-113

7-113.

Peggy decided to sell brownies and cookies to raise money for her basketball uniform. She sold brownies for and cookies for . If she sold fewer cookies than brownies and collected in all, then how many brownies did she sell? Write and solve an equation (or a system of equations) to find your solution.

Write an equation for the problem.

Substitute for in the second equation and solve for , the number of brownies.