SOLUTION: I have to solve algebraically the intersection point of these two equations. x-y=3 2x+y=12

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Question 786729: I have to solve algebraically the intersection point of these two equations.
x-y=3
2x+y=12
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x-y=3
y=x-3
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2x+y=12
2x+x-3=123x=15
x=15/3
x=5
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2*5+y=12
10+y=12
y=12-10
y=2
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(5,2)
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5-2=3