SOLUTION: Solve each system by elimination: –x + 3y = 6 x – 9y = 9 Any help would be appreciated on this problem Eric

Algebra ->  Equations -> SOLUTION: Solve each system by elimination: –x + 3y = 6 x – 9y = 9 Any help would be appreciated on this problem Eric      Log On


   

Question 297161: Solve each system by elimination:
–x + 3y = 6
x – 9y = 9
Any help would be appreciated on this problem
Eric
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
–x + 3y = 6
x – 9y = 9 add.
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-6y=15
y=15/-6
y=-2.5 ans.
-x+3*-2.5=6
-x-7.5=6
-x=6+7.5
-x=13.5
x=13.5/-1
x=-13.5 ans.
Proof:
-13.5-9*-2.5=9
-13.5+22.5=9
9=9