Solve for d
d = \frac{9}{5} = 1\frac{4}{5} = 1.8
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8d+12d=36
Add 12d to both sides.
20d=36
Combine 8d and 12d to get 20d.
d=\frac{36}{20}
Divide both sides by 20.
d=\frac{9}{5}
Reduce the fraction \frac{36}{20} to lowest terms by extracting and canceling out 4.
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