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Simplifying 23D + 13 = 22D + 25 Reorder the terms: 13 + 23D = 22D + 25 Reorder the terms: 13 + 23D = 25 + 22D Solving 13 + 23D = 25 + 22D Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Add '-22D' to each side of the equation. 13 + 23D + -22D = 25 + 22D + -22D Combine like terms: 23D + -22D = 1D 13 + 1D = 25 + 22D + -22D Combine like terms: 22D + -22D = 0 13 + 1D = 25 + 0 13 + 1D = 25 Add '-13' to each side of the equation. 13 + -13 + 1D = 25 + -13 Combine like terms: 13 + -13 = 0 0 + 1D = 25 + -13 1D = 25 + -13 Combine like terms: 25 + -13 = 12 1D = 12 Divide each side by '1'. D = 12 Simplifying D = 12
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