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7-27.

Solve each system. Homework Help ✎

Read Math Notes box in Lesson 6.2.3 on the substitution method.


  1. There is no solution.


  1. Solve the lower equation for , and then substitute the expression for into the top equation and solve.


  1. Substitute for y in the second equation.


  1. Multiply the entire second equation by

    Add the equations together.