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Simplifying 7m + n + -18 + 20n = 0 Reorder the terms: -18 + 7m + n + 20n = 0 Combine like terms: n + 20n = 21n -18 + 7m + 21n = 0 Solving -18 + 7m + 21n = 0 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 7m + 18 + 21n = 0 + 18 Reorder the terms: -18 + 18 + 7m + 21n = 0 + 18 Combine like terms: -18 + 18 = 0 0 + 7m + 21n = 0 + 18 7m + 21n = 0 + 18 Combine like terms: 0 + 18 = 18 7m + 21n = 18 Add '-21n' to each side of the equation. 7m + 21n + -21n = 18 + -21n Combine like terms: 21n + -21n = 0 7m + 0 = 18 + -21n 7m = 18 + -21n Divide each side by '7'. m = 2.571428571 + -3n Simplifying m = 2.571428571 + -3n
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