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Simplifying 3n + 9 + 4n = 0 Reorder the terms: 9 + 3n + 4n = 0 Combine like terms: 3n + 4n = 7n 9 + 7n = 0 Solving 9 + 7n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 7n = 0 + -9 Combine like terms: 9 + -9 = 0 0 + 7n = 0 + -9 7n = 0 + -9 Combine like terms: 0 + -9 = -9 7n = -9 Divide each side by '7'. n = -1.285714286 Simplifying n = -1.285714286
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