SOLUTION: Solve using the substitution method. 6x+7y=-14 x=21-7y

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Question 392167: Solve using the substitution method.
6x+7y=-14
x=21-7y
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
6x+7y=-14
x=21-7y
...
substitute the value of x in the first equation
6(21-7y)+7y=-14
126-42y+7y=-14
-35y=-126-14
-35y=-140
/-35
y=-140/-35
%28highlight%28y+=+4%29%29
.
plug value of y in first equation
6x+7y=-14
6x+7*4=-14
6x+28=-14
6x=-28-14
6x=-42
/6
%28highlight%28x=+-7%29%29
..
m.ananth@hotmail.ca