Question 490914
3x + y=-1
2x +-y= 3 
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5x = 2
x = 2/5 etc.
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substitution
3x + 2y=1 --> 9x + 6y = 3 --> 6y = 3 - 9x
7x + 6y=2
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Sub for 6y in Eqn 2
7x + (3-9x) = 2
-2x = -1
x = 1/2