Posted by anonymous on Monday, April 4, 2011 at 10:44pm.
Multiply first equation by 3.
3x + 3y = -24
-3x + 2y = 9
Add the two equations.
5y = -15
y = -3
Put y value in one equation.
x + (-3) = -8
x = -5
Check by putting both values in the other equation.
(-3)(-5) + 2(-3) = 9
15-6 = 9
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