SOLUTION: y=3x y-4x=10 solve for x

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Question 309873: y=3x
y-4x=10
solve for x
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
y=3x
y-4x=10
subtract the second equation from the first.
y-(y-4x) =3x-10
y-y+4x=3x-10
4x=3x-10
4x-3x=10
x=10
.
y=30