Solve for z
z=\frac{P}{3000}
Solve for P
P=3000z
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3000z=P
Swap sides so that all variable terms are on the left hand side.
\frac{3000z}{3000}=\frac{P}{3000}
Divide both sides by 3000.
z=\frac{P}{3000}
Dividing by 3000 undoes the multiplication by 3000.
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