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x - 2y = -4
2x - y = 1
To solve, multiply both sides of 2nd equation by -2 (remember if you do the same thing to both sides you do not change the equation), then add equations.
x - 2y = -4
-4x + 2y = -2
adding,
-3x = -6
divide by -3 both sides
x = 2
substitute x = 2 into 2nd equation
2(2) - y = 1
4 -y = 1
-y = -3
y = 3
Ans: x = 2, y = 3
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