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Simplifying 15 = -3(7n + 4) Reorder the terms: 15 = -3(4 + 7n) 15 = (4 * -3 + 7n * -3) 15 = (-12 + -21n) Solving 15 = -12 + -21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '21n' to each side of the equation. 15 + 21n = -12 + -21n + 21n Combine like terms: -21n + 21n = 0 15 + 21n = -12 + 0 15 + 21n = -12 Add '-15' to each side of the equation. 15 + -15 + 21n = -12 + -15 Combine like terms: 15 + -15 = 0 0 + 21n = -12 + -15 21n = -12 + -15 Combine like terms: -12 + -15 = -27 21n = -27 Divide each side by '21'. n = -1.285714286 Simplifying n = -1.285714286
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