Solve for Q
Q=-\frac{P}{6}+\frac{9}{2}
Solve for P
P=27-6Q
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-6Q+27=P
Swap sides so that all variable terms are on the left hand side.
-6Q=P-27
Subtract 27 from both sides.
\frac{-6Q}{-6}=\frac{P-27}{-6}
Divide both sides by -6.
Q=\frac{P-27}{-6}
Dividing by -6 undoes the multiplication by -6.
Q=-\frac{P}{6}+\frac{9}{2}
Divide P-27 by -6.
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