SOLUTION: 2x+y=0 x-2y=-10 Solve using the addition or substitution method

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Question 40766This question is from textbook Intermediate Algebra
: 2x+y=0
x-2y=-10
Solve using the addition or substitution method This question is from textbook Intermediate Algebra

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
1st) 2x+y=0
2nd) x-2y=-10
Multiply the 1st by 2 to get:
4x+2y=0
Add that to the 2nd to get:
5x=-10
x=-2
Substitute that into 1st or 2nd to solve for Y, as follows:
2(-2)+y=0
y=4
Check the answer in the 2nd: -2-2(4)=-10
It checks.
Cheers,
Stan H.