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Simplifying 8d + 4 = 7d Reorder the terms: 4 + 8d = 7d Solving 4 + 8d = 7d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-7d' to each side of the equation. 4 + 8d + -7d = 7d + -7d Combine like terms: 8d + -7d = 1d 4 + 1d = 7d + -7d Combine like terms: 7d + -7d = 0 4 + 1d = 0 Add '-4' to each side of the equation. 4 + -4 + 1d = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 1d = 0 + -4 1d = 0 + -4 Combine like terms: 0 + -4 = -4 1d = -4 Divide each side by '1'. d = -4 Simplifying d = -4
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