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Simplifying 3n + -1n + 7 = 13 Reorder the terms: 7 + 3n + -1n = 13 Combine like terms: 3n + -1n = 2n 7 + 2n = 13 Solving 7 + 2n = 13 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2n = 13 + -7 Combine like terms: 7 + -7 = 0 0 + 2n = 13 + -7 2n = 13 + -7 Combine like terms: 13 + -7 = 6 2n = 6 Divide each side by '2'. n = 3 Simplifying n = 3
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