Posted by **Bun** on Tuesday, February 22, 2011 at 4:21pm.

-3x + 2y = 8

x + 4y = -4

use substitution method to solve the linear system.

- Algebra -
**Helper**, Tuesday, February 22, 2011 at 5:47pm
-3x + 2y = 8

x + 4y = -4

x + 4y = -4

x = -4 - 4y

Substitute, x = -4 - 4y in,

-3x + 2y = 8

-3(-4 - 4y) + 2y = 8

12 + 12y + 2y = 8

14y = -4

y = -4/14

y = -2/7

Substitute, y = -2/7 in either equation to find x.

Then check your solutions in the original equations.

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