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Simplifying 15 = -1(1 + -2n) 15 = (1 * -1 + -2n * -1) 15 = (-1 + 2n) Solving 15 = -1 + 2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2n' to each side of the equation. 15 + -2n = -1 + 2n + -2n Combine like terms: 2n + -2n = 0 15 + -2n = -1 + 0 15 + -2n = -1 Add '-15' to each side of the equation. 15 + -15 + -2n = -1 + -15 Combine like terms: 15 + -15 = 0 0 + -2n = -1 + -15 -2n = -1 + -15 Combine like terms: -1 + -15 = -16 -2n = -16 Divide each side by '-2'. n = 8 Simplifying n = 8
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