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Simplifying 12m + -1(m + -5) + -7(2m + 1) = 0 Reorder the terms: 12m + -1(-5 + m) + -7(2m + 1) = 0 12m + (-5 * -1 + m * -1) + -7(2m + 1) = 0 12m + (5 + -1m) + -7(2m + 1) = 0 Reorder the terms: 12m + 5 + -1m + -7(1 + 2m) = 0 12m + 5 + -1m + (1 * -7 + 2m * -7) = 0 12m + 5 + -1m + (-7 + -14m) = 0 Reorder the terms: 5 + -7 + 12m + -1m + -14m = 0 Combine like terms: 5 + -7 = -2 -2 + 12m + -1m + -14m = 0 Combine like terms: 12m + -1m = 11m -2 + 11m + -14m = 0 Combine like terms: 11m + -14m = -3m -2 + -3m = 0 Solving -2 + -3m = 0 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3m = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3m = 0 + 2 -3m = 0 + 2 Combine like terms: 0 + 2 = 2 -3m = 2 Divide each side by '-3'. m = -0.6666666667 Simplifying m = -0.6666666667
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