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Simplifying -39 = -3(-3m + 7) Reorder the terms: -39 = -3(7 + -3m) -39 = (7 * -3 + -3m * -3) -39 = (-21 + 9m) Solving -39 = -21 + 9m Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-9m' to each side of the equation. -39 + -9m = -21 + 9m + -9m Combine like terms: 9m + -9m = 0 -39 + -9m = -21 + 0 -39 + -9m = -21 Add '39' to each side of the equation. -39 + 39 + -9m = -21 + 39 Combine like terms: -39 + 39 = 0 0 + -9m = -21 + 39 -9m = -21 + 39 Combine like terms: -21 + 39 = 18 -9m = 18 Divide each side by '-9'. m = -2 Simplifying m = -2
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