SOLUTION: x+3y=19 x-y=-1 --------- what does it equal?

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Question 255175: x+3y=19
x-y=-1
---------
what does it equal?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
There are several ways to solve this.
You can substitute or eliminate.
Let's do elimination
Subtract second equation from the first which eliminates the x's. Be careful with signs plus and minus.
Divide both sides by 4. The reason for 4 should be obvious. If not do the subtraction again.