SOLUTION: x-y=4 x+y=2

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Question 319292: x-y=4
x+y=2
Answer by mananth(16946) About Me  (Show Source):
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x-y=4
x+y=2
..
add up the two equations
x-y+x+y=4+2
2x=6
dvide the equation by 2
2x/2 = 6/2
x=3
..
x+y=4
plug the value ofx in the equation
3+y=2
y=2-3
y=-1