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Simplifying 7(m + -2) + -2(3 + m) = 80 Reorder the terms: 7(-2 + m) + -2(3 + m) = 80 (-2 * 7 + m * 7) + -2(3 + m) = 80 (-14 + 7m) + -2(3 + m) = 80 -14 + 7m + (3 * -2 + m * -2) = 80 -14 + 7m + (-6 + -2m) = 80 Reorder the terms: -14 + -6 + 7m + -2m = 80 Combine like terms: -14 + -6 = -20 -20 + 7m + -2m = 80 Combine like terms: 7m + -2m = 5m -20 + 5m = 80 Solving -20 + 5m = 80 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 5m = 80 + 20 Combine like terms: -20 + 20 = 0 0 + 5m = 80 + 20 5m = 80 + 20 Combine like terms: 80 + 20 = 100 5m = 100 Divide each side by '5'. m = 20 Simplifying m = 20
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