SOLUTION: Solve the system by addition. x + y = 4 x – y = 10

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Question 104265: Solve the system by addition.
x + y = 4
x – y = 10
Answer by HyperBrain(694) About Me  (Show Source):
You can put this solution on YOUR website!
x-y=10
__x=y+10
x+y=4
But,
__x=y+10
Thus,
y+10+y=4
_2y+10=4
____2y=-6
_____y=-3
Solving for x,
x=-3+10
x=7

Therefore, x=7 and y=-3.

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