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Home > CC4 > Chapter 7 > Lesson 7.1.2 > Problem 7-27

7-27.

Solve each system. Homework Help ✎

  1. 6x − 2y = 10
    3x − 2 = y

  2. 3x − 9y = 3
    2x = 16 − y

  3. y = 3x + 1
    x + 2y = −5

  4. 2x + 3y = 9
    x − 2y = 1

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

There is no solution.

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

Substitute 3x + 1 for y in the second equation.

(−1, −2)

Multiply the entire second equation by −2

Add the equations together.

(3, 1)