### Home > GB8I > Chapter 7 Unit 8 > Lesson INT1: 7.1.2 > Problem 7-27

7-27.

Solve each system.

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

There is no solution.

Solve the lower equation for

, and then substitute the expression forinto the top equation and solve.

Substitute

for *y*in the second equation.

Multiply the entire second equation by

Add the equations together.