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