Solve for p
p=-\frac{x}{2}+60
Solve for x
x=120-2p
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120-2p=x
Swap sides so that all variable terms are on the left hand side.
-2p=x-120
Subtract 120 from both sides.
\frac{-2p}{-2}=\frac{x-120}{-2}
Divide both sides by -2.
p=\frac{x-120}{-2}
Dividing by -2 undoes the multiplication by -2.
p=-\frac{x}{2}+60
Divide x-120 by -2.
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