Solve for m
m=\frac{F-36}{9}
Solve for F
F=9\left(m+4\right)
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-9m=36-F
Subtract F from both sides.
\frac{-9m}{-9}=\frac{36-F}{-9}
Divide both sides by -9.
m=\frac{36-F}{-9}
Dividing by -9 undoes the multiplication by -9.
m=\frac{F}{9}-4
Divide 36-F by -9.
F=36+9m
Add 9m to both sides.
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