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Simplifying 2[7 + -5(1 + -1n)] + -6n = -12 + -3[6(n + -1) + -3n] 2[7 + (1 * -5 + -1n * -5)] + -6n = -12 + -3[6(n + -1) + -3n] 2[7 + (-5 + 5n)] + -6n = -12 + -3[6(n + -1) + -3n] Combine like terms: 7 + -5 = 2 2[2 + 5n] + -6n = -12 + -3[6(n + -1) + -3n] [2 * 2 + 5n * 2] + -6n = -12 + -3[6(n + -1) + -3n] [4 + 10n] + -6n = -12 + -3[6(n + -1) + -3n] Combine like terms: 10n + -6n = 4n 4 + 4n = -12 + -3[6(n + -1) + -3n] Reorder the terms: 4 + 4n = -12 + -3[6(-1 + n) + -3n] 4 + 4n = -12 + -3[(-1 * 6 + n * 6) + -3n] 4 + 4n = -12 + -3[(-6 + 6n) + -3n] Combine like terms: 6n + -3n = 3n 4 + 4n = -12 + -3[-6 + 3n] 4 + 4n = -12 + [-6 * -3 + 3n * -3] 4 + 4n = -12 + [18 + -9n] Combine like terms: -12 + 18 = 6 4 + 4n = 6 + -9n Solving 4 + 4n = 6 + -9n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '9n' to each side of the equation. 4 + 4n + 9n = 6 + -9n + 9n Combine like terms: 4n + 9n = 13n 4 + 13n = 6 + -9n + 9n Combine like terms: -9n + 9n = 0 4 + 13n = 6 + 0 4 + 13n = 6 Add '-4' to each side of the equation. 4 + -4 + 13n = 6 + -4 Combine like terms: 4 + -4 = 0 0 + 13n = 6 + -4 13n = 6 + -4 Combine like terms: 6 + -4 = 2 13n = 2 Divide each side by '13'. n = 0.1538461538 Simplifying n = 0.1538461538
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