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Simplifying 81 = -7(m + -3) + 4 Reorder the terms: 81 = -7(-3 + m) + 4 81 = (-3 * -7 + m * -7) + 4 81 = (21 + -7m) + 4 Reorder the terms: 81 = 21 + 4 + -7m Combine like terms: 21 + 4 = 25 81 = 25 + -7m Solving 81 = 25 + -7m Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '7m' to each side of the equation. 81 + 7m = 25 + -7m + 7m Combine like terms: -7m + 7m = 0 81 + 7m = 25 + 0 81 + 7m = 25 Add '-81' to each side of the equation. 81 + -81 + 7m = 25 + -81 Combine like terms: 81 + -81 = 0 0 + 7m = 25 + -81 7m = 25 + -81 Combine like terms: 25 + -81 = -56 7m = -56 Divide each side by '7'. m = -8 Simplifying m = -8
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