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Solve for F
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xF=3x+5
The equation is in standard form.
\frac{xF}{x}=\frac{3x+5}{x}
Divide both sides by x.
F=\frac{3x+5}{x}
Dividing by x undoes the multiplication by x.
F=3+\frac{5}{x}
Divide 3x+5 by x.
Fx-3x=5
Subtract 3x from both sides.
\left(F-3\right)x=5
Combine all terms containing x.
\frac{\left(F-3\right)x}{F-3}=\frac{5}{F-3}
Divide both sides by F-3.
x=\frac{5}{F-3}
Dividing by F-3 undoes the multiplication by F-3.