SOLUTION: solve for x and y 3x+1=-7y 6x+7y=0

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Question 64867This question is from textbook algebra 1
: solve for x and y
3x+1=-7y
6x+7y=0
This question is from textbook algebra 1

Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!
3X+1=-7Y
3X+7Y=-1
-(6X+7Y=0) NOW SUBTRACT THESE 2 EQUATIONS.
----------------------------
-3X=-1
X=-1/-3
X=1/3 SOLUTION. SUBSTITUTING 1/3 FOR X IN EITHER EQUATION WE SOLVE FOR Y
3*1/3+1=-7Y
1+1=-7Y
7Y=-2
Y=-2/7 SOLUTION
PROOF
6*1/3+7(-2/7)=0
2-14/7=0
2-2=0
0=0

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