Posted by star on Tuesday, December 7, 2010 at 1:47pm.
- 10th grade - Henry, Thursday, December 9, 2010 at 2:05am
Eq1: 2x - y = -5
Eq2: -2x - 5y = 11
Add the 2 Eqs and get:
-6y = 6,
Divide both sides by -6:
y = 6 / -6 = -1.
Substitute -1 for y in Eq1:
2x - (-1) = -5,
2x + 1 = -5,
2x = -5 -1,
2x = -6,
Divide both sides by 2:
x = -6 / 2 = -3.
Solution set: (-3 , -1).
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