SOLUTION: How do you solve this problem by using elimination? 2x-y=-1 3x+2y=30

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Question 160337: How do you solve this problem by using elimination? 2x-y=-1
3x+2y=30
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
2x-y=-1 multiply his equation by 2 & add them.
3x+2y=30
4x-2y=-2
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7x=28
x=28/7
x=4 answer.
2*4-y=-1
8-y=-1
-y=-1-8
-y=-9
y=9 answer.
proof:
3*4+2*9=30
12+18=30
30=30