SOLUTION: I'm kind of confused how to solve by elimination. Can someone help me? 3x+4y=-1 -9x-4y=13

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Question 901240: I'm kind of confused how to solve by elimination. Can someone help me?
3x+4y=-1
-9x-4y=13
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Original System
3x+4y=-1
-9x-4y=13

3(3x+4y)=3(-1)
-9x-4y=13
ADD.
Solve y.

3x+4y=-1
-9x-4y=13
ADD.
Solve x.