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9(8d + 5) + 13 = 12d - 2
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9(8d + 5) + 13 = 12d - 2

User Chigley
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9(8d + 5) + 13 = 12d - 2\\\\72d + 45 +13 = 12d -2\\\\72d +58 = 12d -2\\\\ 60d +58 =-2\\\\60d=-60\\\\\boxed {d=-1}
User Anwartheravian
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