Solve for y
y=x-150
Solve for x
x=y+150
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-y=150-x
Subtract x from both sides.
\frac{-y}{-1}=\frac{150-x}{-1}
Divide both sides by -1.
y=\frac{150-x}{-1}
Dividing by -1 undoes the multiplication by -1.
y=x-150
Divide 150-x by -1.
x=150+y
Add y to both sides.
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