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2-27.
  1. Solve each of the following systems of equations algebraically. Then confirm your solutions by graphing. Homework Help ✎

    1. y = 4x + 5
      y = −2x − 13

    2. 2x + y = 9
      y = −x + 4

Substitute 4x + 5 for y.

4x + 5 = −2x − 13

See part (a).

Solve for x.

x = −3

Substitute −3 for x.

y = −12 + 5

Solve for y.

y = −7

(−3, −7)