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Simplifying 3n + 7 = n + 9 Reorder the terms: 7 + 3n = n + 9 Reorder the terms: 7 + 3n = 9 + n Solving 7 + 3n = 9 + n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. 7 + 3n + -1n = 9 + n + -1n Combine like terms: 3n + -1n = 2n 7 + 2n = 9 + n + -1n Combine like terms: n + -1n = 0 7 + 2n = 9 + 0 7 + 2n = 9 Add '-7' to each side of the equation. 7 + -7 + 2n = 9 + -7 Combine like terms: 7 + -7 = 0 0 + 2n = 9 + -7 2n = 9 + -7 Combine like terms: 9 + -7 = 2 2n = 2 Divide each side by '2'. n = 1 Simplifying n = 1
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