Solve for x
x=\frac{5\left(P-20\right)}{4}
Solve for P
P=\frac{4\left(x+25\right)}{5}
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\frac{4x}{5}+20=P
Swap sides so that all variable terms are on the left hand side.
\frac{4x}{5}=P-20
Subtract 20 from both sides.
4x=5P-100
Multiply both sides of the equation by 5.
\frac{4x}{4}=\frac{5P-100}{4}
Divide both sides by 4.
x=\frac{5P-100}{4}
Dividing by 4 undoes the multiplication by 4.
x=\frac{5P}{4}-25
Divide -100+5P by 4.
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