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Simplifying 12d + 4u = 8d Solving 12d + 4u = 8d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-8d' to each side of the equation. 12d + -8d + 4u = 8d + -8d Combine like terms: 12d + -8d = 4d 4d + 4u = 8d + -8d Combine like terms: 8d + -8d = 0 4d + 4u = 0 Add '-4u' to each side of the equation. 4d + 4u + -4u = 0 + -4u Combine like terms: 4u + -4u = 0 4d + 0 = 0 + -4u 4d = 0 + -4u Remove the zero: 4d = -4u Divide each side by '4'. d = -1u Simplifying d = -1u
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