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Simplifying 9c + 21d = 0 Solving 9c + 21d = 0 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-21d' to each side of the equation. 9c + 21d + -21d = 0 + -21d Combine like terms: 21d + -21d = 0 9c + 0 = 0 + -21d 9c = 0 + -21d Remove the zero: 9c = -21d Divide each side by '9'. c = -2.333333333d Simplifying c = -2.333333333d
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