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Simplifying 15m + -21n + 9 = 0 Reorder the terms: 9 + 15m + -21n = 0 Solving 9 + 15m + -21n = 0 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + 15m + -9 + -21n = 0 + -9 Reorder the terms: 9 + -9 + 15m + -21n = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 15m + -21n = 0 + -9 15m + -21n = 0 + -9 Combine like terms: 0 + -9 = -9 15m + -21n = -9 Add '21n' to each side of the equation. 15m + -21n + 21n = -9 + 21n Combine like terms: -21n + 21n = 0 15m + 0 = -9 + 21n 15m = -9 + 21n Divide each side by '15'. m = -0.6 + 1.4n Simplifying m = -0.6 + 1.4n
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