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Substitution - Algebra p. 439 - First, students must solve for x or y.

Author: Amy Ferguson

Substitution p.439 #12

Solve the system using substitution:
2x + y = 9 and 4x - y = -15

Substitution - p439 #13

First students must solve for x or y before being able to substitute.
5x + 2y = 9 and x + y = -3