Solve for p
p=-\frac{x}{10}+30
Solve for x
x=300-10p
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300-10p=x
Swap sides so that all variable terms are on the left hand side.
-10p=x-300
Subtract 300 from both sides.
\frac{-10p}{-10}=\frac{x-300}{-10}
Divide both sides by -10.
p=\frac{x-300}{-10}
Dividing by -10 undoes the multiplication by -10.
p=-\frac{x}{10}+30
Divide x-300 by -10.
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