SOLUTION: how is this addition method solved? 4x-3y=10 5x+6y=-7

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Question 214651: how is this addition method solved?

4x-3y=10
5x+6y=-7
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
4x-3y=10 multiply by 2 & add.
5x+6y=-7
8x-6y=20
---------------
13x=13
x=13/13
x=1 ans.
4*1-3y=10
4-3y=10
-3y=10-4
-3y=6
y=6/-3
y=-2 ans.
Proof:
5*1+6*-2=-7
5-12=-7
-7=-7