Solve for m
m=\frac{x}{3}
Solve for x
x=3m
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-3m=-x
Subtract x from both sides. Anything subtracted from zero gives its negation.
\frac{-3m}{-3}=-\frac{x}{-3}
Divide both sides by -3.
m=-\frac{x}{-3}
Dividing by -3 undoes the multiplication by -3.
m=\frac{x}{3}
Divide -x by -3.
x=3m
Add 3m to both sides. Anything plus zero gives itself.
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