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Simplifying D2 + -10d + 21 = 0 Reorder the terms: 21 + D2 + -10d = 0 Solving 21 + D2 + -10d = 0 Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + D2 + -21 + -10d = 0 + -21 Reorder the terms: 21 + -21 + D2 + -10d = 0 + -21 Combine like terms: 21 + -21 = 0 0 + D2 + -10d = 0 + -21 D2 + -10d = 0 + -21 Combine like terms: 0 + -21 = -21 D2 + -10d = -21 Add '10d' to each side of the equation. D2 + -10d + 10d = -21 + 10d Combine like terms: -10d + 10d = 0 D2 + 0 = -21 + 10d D2 = -21 + 10d Simplifying D2 = -21 + 10d Reorder the terms: 21 + D2 + -10d = -21 + 10d + 21 + -10d Reorder the terms: 21 + D2 + -10d = -21 + 21 + 10d + -10d Combine like terms: -21 + 21 = 0 21 + D2 + -10d = 0 + 10d + -10d 21 + D2 + -10d = 10d + -10d Combine like terms: 10d + -10d = 0 21 + D2 + -10d = 0 The solution to this equation could not be determined.
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