Solve for t
t=\frac{d}{3}
Solve for d
d=3t
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3t=d
Swap sides so that all variable terms are on the left hand side.
\frac{3t}{3}=\frac{d}{3}
Divide both sides by 3.
t=\frac{d}{3}
Dividing by 3 undoes the multiplication by 3.
Examples
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