Solve for D
D=0
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D=\frac{D}{-1500}
Subtract 1516 from 16 to get -1500.
D-\frac{D}{-1500}=0
Subtract \frac{D}{-1500} from both sides.
\frac{1501}{1500}D=0
Combine D and -\frac{D}{-1500} to get \frac{1501}{1500}D.
D=0
Product of two numbers is equal to 0 if at least one of them is 0. Since \frac{1501}{1500} is not equal to 0, D must be equal to 0.
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