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Simplifying 9n + 3 = 7n + 13 Reorder the terms: 3 + 9n = 7n + 13 Reorder the terms: 3 + 9n = 13 + 7n Solving 3 + 9n = 13 + 7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7n' to each side of the equation. 3 + 9n + -7n = 13 + 7n + -7n Combine like terms: 9n + -7n = 2n 3 + 2n = 13 + 7n + -7n Combine like terms: 7n + -7n = 0 3 + 2n = 13 + 0 3 + 2n = 13 Add '-3' to each side of the equation. 3 + -3 + 2n = 13 + -3 Combine like terms: 3 + -3 = 0 0 + 2n = 13 + -3 2n = 13 + -3 Combine like terms: 13 + -3 = 10 2n = 10 Divide each side by '2'. n = 5 Simplifying n = 5
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