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Simplifying 13 = -2m + 7(m + -1) Reorder the terms: 13 = -2m + 7(-1 + m) 13 = -2m + (-1 * 7 + m * 7) 13 = -2m + (-7 + 7m) Reorder the terms: 13 = -7 + -2m + 7m Combine like terms: -2m + 7m = 5m 13 = -7 + 5m Solving 13 = -7 + 5m Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-5m' to each side of the equation. 13 + -5m = -7 + 5m + -5m Combine like terms: 5m + -5m = 0 13 + -5m = -7 + 0 13 + -5m = -7 Add '-13' to each side of the equation. 13 + -13 + -5m = -7 + -13 Combine like terms: 13 + -13 = 0 0 + -5m = -7 + -13 -5m = -7 + -13 Combine like terms: -7 + -13 = -20 -5m = -20 Divide each side by '-5'. m = 4 Simplifying m = 4
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