Solve for d
d = \frac{5}{2} = 2\frac{1}{2} = 2.5
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\frac{30}{12}=d
Divide both sides by 12.
\frac{5}{2}=d
Reduce the fraction \frac{30}{12} to lowest terms by extracting and canceling out 6.
d=\frac{5}{2}
Swap sides so that all variable terms are on the left hand side.
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