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Simplifying -13(d + 1) = -16d Reorder the terms: -13(1 + d) = -16d (1 * -13 + d * -13) = -16d (-13 + -13d) = -16d Solving -13 + -13d = -16d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '16d' to each side of the equation. -13 + -13d + 16d = -16d + 16d Combine like terms: -13d + 16d = 3d -13 + 3d = -16d + 16d Combine like terms: -16d + 16d = 0 -13 + 3d = 0 Add '13' to each side of the equation. -13 + 13 + 3d = 0 + 13 Combine like terms: -13 + 13 = 0 0 + 3d = 0 + 13 3d = 0 + 13 Combine like terms: 0 + 13 = 13 3d = 13 Divide each side by '3'. d = 4.333333333 Simplifying d = 4.333333333
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