SOLUTION: This needs to be solved by the substitution method. 4x + 4y = 0 -8x + y = 72

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Question 455036: This needs to be solved by the substitution method.
4x + 4y = 0
-8x + y = 72
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
4x+4y=0 .............1
y=72+8x ---------2
substitute y in (1)
4x+4(72+8x)=0
4x+288+32x=0
4x+32x=0-288
36x=-288
/36
x=-8
Plug the value of x in (1)
4x+4y=0
4*-8+4y=0
-32+4y=0
4y=32
/4
y=8