Solve for Q
Q=65-5P
Solve for P
P=-\frac{Q}{5}+13
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13-0.2Q=P
Swap sides so that all variable terms are on the left hand side.
-0.2Q=P-13
Subtract 13 from both sides.
\frac{-0.2Q}{-0.2}=\frac{P-13}{-0.2}
Multiply both sides by -5.
Q=\frac{P-13}{-0.2}
Dividing by -0.2 undoes the multiplication by -0.2.
Q=65-5P
Divide P-13 by -0.2 by multiplying P-13 by the reciprocal of -0.2.
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