SOLUTION: Use the substitution method to solve 3x-y=-10 4x+4y=40

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Question 616698: Use the substitution method to solve
3x-y=-10
4x+4y=40
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
multiply the first by 4 and then add the new equation to the second
3x-y=-10
12x-4y=-40
4x+4y=40
16x=0
x=0
y=10