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Simplifying 5m + -21 = 2m + 9 Reorder the terms: -21 + 5m = 2m + 9 Reorder the terms: -21 + 5m = 9 + 2m Solving -21 + 5m = 9 + 2m Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2m' to each side of the equation. -21 + 5m + -2m = 9 + 2m + -2m Combine like terms: 5m + -2m = 3m -21 + 3m = 9 + 2m + -2m Combine like terms: 2m + -2m = 0 -21 + 3m = 9 + 0 -21 + 3m = 9 Add '21' to each side of the equation. -21 + 21 + 3m = 9 + 21 Combine like terms: -21 + 21 = 0 0 + 3m = 9 + 21 3m = 9 + 21 Combine like terms: 9 + 21 = 30 3m = 30 Divide each side by '3'. m = 10 Simplifying m = 10
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