Question 934631: Please help me
substitution
x=y+7
y-8=2x
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! Replace EVERY x in y-8=2x with y+7. Why is this valid? Because we're given that x = y+7
So we go from
y-8=2x
to
y-8=2(y+7)
From here, we distribute
y-8 = 2y + 14
I'll let you finish up. You need to solve for y. Once you have the solution for y, you plug it into x = y+7 to get the solution for x.
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