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Simplifying 78 = -2(m + 3) + 3 Reorder the terms: 78 = -2(3 + m) + 3 78 = (3 * -2 + m * -2) + 3 78 = (-6 + -2m) + 3 Reorder the terms: 78 = -6 + 3 + -2m Combine like terms: -6 + 3 = -3 78 = -3 + -2m Solving 78 = -3 + -2m Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2m' to each side of the equation. 78 + 2m = -3 + -2m + 2m Combine like terms: -2m + 2m = 0 78 + 2m = -3 + 0 78 + 2m = -3 Add '-78' to each side of the equation. 78 + -78 + 2m = -3 + -78 Combine like terms: 78 + -78 = 0 0 + 2m = -3 + -78 2m = -3 + -78 Combine like terms: -3 + -78 = -81 2m = -81 Divide each side by '2'. m = -40.5 Simplifying m = -40.5
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