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Simplifying (2m + -15) + (m + -20) + (m + 10) = 180 Reorder the terms: (-15 + 2m) + (m + -20) + (m + 10) = 180 Remove parenthesis around (-15 + 2m) -15 + 2m + (m + -20) + (m + 10) = 180 Reorder the terms: -15 + 2m + (-20 + m) + (m + 10) = 180 Remove parenthesis around (-20 + m) -15 + 2m + -20 + m + (m + 10) = 180 Reorder the terms: -15 + 2m + -20 + m + (10 + m) = 180 Remove parenthesis around (10 + m) -15 + 2m + -20 + m + 10 + m = 180 Reorder the terms: -15 + -20 + 10 + 2m + m + m = 180 Combine like terms: -15 + -20 = -35 -35 + 10 + 2m + m + m = 180 Combine like terms: -35 + 10 = -25 -25 + 2m + m + m = 180 Combine like terms: 2m + m = 3m -25 + 3m + m = 180 Combine like terms: 3m + m = 4m -25 + 4m = 180 Solving -25 + 4m = 180 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + 4m = 180 + 25 Combine like terms: -25 + 25 = 0 0 + 4m = 180 + 25 4m = 180 + 25 Combine like terms: 180 + 25 = 205 4m = 205 Divide each side by '4'. m = 51.25 Simplifying m = 51.25
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