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Simplifying -13d + 12 = -169 Reorder the terms: 12 + -13d = -169 Solving 12 + -13d = -169 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + -13d = -169 + -12 Combine like terms: 12 + -12 = 0 0 + -13d = -169 + -12 -13d = -169 + -12 Combine like terms: -169 + -12 = -181 -13d = -181 Divide each side by '-13'. d = 13.92307692 Simplifying d = 13.92307692
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