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7-110.

Brian was holding a ballroom dance. He wanted to make sure girls would come, so he charged boys $ to get in but girls only $. The people who came paid a total of $. How many girls came to the dance?

Set up a system of equation, where we let boys and girls.

Review the Math Notes box in Lesson 6.3.3 on the Elimination Method for systems of equations.

girls came to the dance.