9 - 4 d \geq - 3
Solve for d
d\leq 3
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-4d\geq -3-9
Subtract 9 from both sides.
-4d\geq -12
Subtract 9 from -3 to get -12.
d\leq \frac{-12}{-4}
Divide both sides by -4. Since -4 is negative, the inequality direction is changed.
d\leq 3
Divide -12 by -4 to get 3.
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