Solve for f
f=30+\frac{1200}{x}
x\neq 0
Solve for x
x=\frac{1200}{f-30}
f\neq 30
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xf=30x+1200
The equation is in standard form.
\frac{xf}{x}=\frac{30x+1200}{x}
Divide both sides by x.
f=\frac{30x+1200}{x}
Dividing by x undoes the multiplication by x.
f=30+\frac{1200}{x}
Divide 1200+30x by x.
fx-30x=1200
Subtract 30x from both sides.
\left(f-30\right)x=1200
Combine all terms containing x.
\frac{\left(f-30\right)x}{f-30}=\frac{1200}{f-30}
Divide both sides by f-30.
x=\frac{1200}{f-30}
Dividing by f-30 undoes the multiplication by f-30.
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