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Simplifying 2.5d + 7.75 = 4 + 3.75d Reorder the terms: 7.75 + 2.5d = 4 + 3.75d Solving 7.75 + 2.5d = 4 + 3.75d Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-3.75d' to each side of the equation. 7.75 + 2.5d + -3.75d = 4 + 3.75d + -3.75d Combine like terms: 2.5d + -3.75d = -1.25d 7.75 + -1.25d = 4 + 3.75d + -3.75d Combine like terms: 3.75d + -3.75d = 0.00 7.75 + -1.25d = 4 + 0.00 7.75 + -1.25d = 4 Add '-7.75' to each side of the equation. 7.75 + -7.75 + -1.25d = 4 + -7.75 Combine like terms: 7.75 + -7.75 = 0.00 0.00 + -1.25d = 4 + -7.75 -1.25d = 4 + -7.75 Combine like terms: 4 + -7.75 = -3.75 -1.25d = -3.75 Divide each side by '-1.25'. d = 3 Simplifying d = 3
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