SOLUTION: X=y+4 2x+y=12 How do you solve problems such as this one?

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Question 1046498: X=y+4
2x+y=12
How do you solve problems such as this one?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
There's more than one way.
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There's trial and error.
There's inspection.
There's elimination.
There's substitution.
There's graphing.