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Simplifying 5m + -21 = 7 + m Reorder the terms: -21 + 5m = 7 + m Solving -21 + 5m = 7 + m Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1m' to each side of the equation. -21 + 5m + -1m = 7 + m + -1m Combine like terms: 5m + -1m = 4m -21 + 4m = 7 + m + -1m Combine like terms: m + -1m = 0 -21 + 4m = 7 + 0 -21 + 4m = 7 Add '21' to each side of the equation. -21 + 21 + 4m = 7 + 21 Combine like terms: -21 + 21 = 0 0 + 4m = 7 + 21 4m = 7 + 21 Combine like terms: 7 + 21 = 28 4m = 28 Divide each side by '4'. m = 7 Simplifying m = 7
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