Answers

2016-07-21T14:20:35+08:00
3x - 2y = 5

First, get the value of Y. To do so, derive the value of x

x + 2y = -1

x = -2y - 1

Substitute, 

3(-2y - 1) - 2y = 5
-6y - 3 - 2y = 5
-8y = 5 + 3
-8y/-8 = 8/-8
y = -1

Use the value of Y to find the value of x

x = -2y - 1
x = -2(-1) - 1
x = 2 - 1
x = 1
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