To expand the expression \(-\frac{5}{6}(9b - 12)\), you will distribute \(-\frac{5}{6}\) to both terms inside the parentheses:
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Multiply \(-\frac{5}{6}\) by \(9b\): \[ -\frac{5}{6} \cdot 9b = -\frac{45}{6}b = -\frac{15}{2}b \]
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Multiply \(-\frac{5}{6}\) by \(-12\): \[ -\frac{5}{6} \cdot -12 = \frac{5 \cdot 12}{6} = \frac{60}{6} = 10 \]
Now, combine the results: \[ -\frac{5}{6}(9b - 12) = -\frac{15}{2}b + 10 \]
So, the completed expanded expression is: \[ -\frac{15}{2}b + 10 \]