SOLUTION: x/9 -y/7= -1 x-y=-3 solve the system with the addition method

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Question 214874: x/9 -y/7= -1
x-y=-3
solve the system with the addition method
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x/9-y/7=-1 MULTIPLY BY -7 & ADD.
x-y=-3
-7X/9+Y=7
X-Y=-3
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X-7X/9=4
(9X-7X)/9=4
2X=36
X=36/2
X=18 ANS.
18-Y=-3
-Y=-3-18
-Y=-21
Y=21 ANS.