Evaluate
-\frac{d}{2c}-\frac{13}{8}
Expand
-\frac{d}{2c}-\frac{13}{8}
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\frac{-\left(9c-3d\right)-\left(4c+7d\right)}{8c}
Since -\frac{9c-3d}{8c} and \frac{4c+7d}{8c} have the same denominator, subtract them by subtracting their numerators.
\frac{-9c+3d-4c-7d}{8c}
Do the multiplications in -\left(9c-3d\right)-\left(4c+7d\right).
\frac{-13c-4d}{8c}
Combine like terms in -9c+3d-4c-7d.
\frac{-\left(9c-3d\right)-\left(4c+7d\right)}{8c}
Since -\frac{9c-3d}{8c} and \frac{4c+7d}{8c} have the same denominator, subtract them by subtracting their numerators.
\frac{-9c+3d-4c-7d}{8c}
Do the multiplications in -\left(9c-3d\right)-\left(4c+7d\right).
\frac{-13c-4d}{8c}
Combine like terms in -9c+3d-4c-7d.
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