SOLUTION: elimination method 3x-9y=10 15x-45y=20 I multiplied the first equation by 5 which gives 15x+45y=50 15x-45y=20 __________

SOLUTION: elimination method 3x-9y=10 15x-45y=20 I multiplied the first equation by 5 which gives 15x+45y=50 15x-45y=20 ___________ 30x = 70 is that right?

Question 45841: elimination method
3x-9y=10
15x-45y=20
I multiplied the first equation by 5 which gives 15x+45y=50
15x-45y=20
___________
30x = 70
is that right?
Answer by tutorcecilia(2152) (Show Source): You can put this solution on YOUR website!
Multiply by (-5) instead of (5):
-5(3x-9y=10
15x-45y=20
________________
.
.
-15x+45y=-50
+15x-45y=20
________________
0 = -30 (false statement)
.
[Graphing shows that the lines are parallel, not perpendicular]

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