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Simplifying -84 = 3(-3m + -7) Reorder the terms: -84 = 3(-7 + -3m) -84 = (-7 * 3 + -3m * 3) -84 = (-21 + -9m) Solving -84 = -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. -84 + 9m = -21 + -9m + 9m Combine like terms: -9m + 9m = 0 -84 + 9m = -21 + 0 -84 + 9m = -21 Add '84' to each side of the equation. -84 + 84 + 9m = -21 + 84 Combine like terms: -84 + 84 = 0 0 + 9m = -21 + 84 9m = -21 + 84 Combine like terms: -21 + 84 = 63 9m = 63 Divide each side by '9'. m = 7 Simplifying m = 7
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