SOLUTION: How do I use elimination to solve the system: 2x-5y=-46 x+10y=77?

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Question 659444: How do I use elimination to solve the system: 2x-5y=-46 x+10y=77?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

2x-5y=-46...........1
x%2B10y=77............2
______________________________multiply equation 2 by -2
-2x-20y=-154............2........now add 1 and 2
___________________________________

2x-5y=-46...........1
+
-2x-20y=-154............2
___________________________
2x-2x-5y-20y=-46-154
-5y-20y=-46-154......solve for y
-25y=-200.........both sides multiply by -1
25y=200
y=200%2F25
highlight%28y=8%29
now, find x

x%2B10y=77............2
x%2B10%2A8=77
x%2B80=77
x=77-80
highlight%28x=-3%29