Simplify: $9 (8 d - 3) - 8 (5 d + 4) = 0$ .

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Solution

$9 (8 d - 3) - 8 (5 d + 4) = 0 \Rightarrow 72 d - 27 - 40 d - 32 = 0 \Rightarrow 32 d = 59 \Rightarrow d = \frac{59}{32}$

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