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Simplifying 7n + 3(3n + 1) = -125 Reorder the terms: 7n + 3(1 + 3n) = -125 7n + (1 * 3 + 3n * 3) = -125 7n + (3 + 9n) = -125 Reorder the terms: 3 + 7n + 9n = -125 Combine like terms: 7n + 9n = 16n 3 + 16n = -125 Solving 3 + 16n = -125 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 16n = -125 + -3 Combine like terms: 3 + -3 = 0 0 + 16n = -125 + -3 16n = -125 + -3 Combine like terms: -125 + -3 = -128 16n = -128 Divide each side by '16'. n = -8 Simplifying n = -8
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