SOLUTION: using substitution 2x-y=0 X+3y=-56

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Question 181569: using substitution
2x-y=0
X+3y=-56
Answer by vleith(2517) About Me  (Show Source):
You can put this solution on YOUR website!
2x-y+=+0
2x+=+y
x%2B3y+=+-56
x+%2B+3%282x%29+=+-56 using the value for y from above
x%2B6x+=+-56
7x+=+-56
x+=+-8
Now use this value for x to solve for y
2%28-8%29+=+y
-16+=+y
Check your answer
Does
x%2B3y+=+-56
-8+%2B+3%28-16%29+=+-56 ???