SOLUTION: solve the system using elimination: {3x-y=4 {x+y=8

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Question 247282: solve the system using elimination:
{3x-y=4
{x+y=8
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
3x-y=4
x+y=8
add the two equations
4x=12
x=3
x+y=8
3+y=8
5=y