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Simplifying 3n + 12 = n + 20 Reorder the terms: 12 + 3n = n + 20 Reorder the terms: 12 + 3n = 20 + n Solving 12 + 3n = 20 + 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. 12 + 3n + -1n = 20 + n + -1n Combine like terms: 3n + -1n = 2n 12 + 2n = 20 + n + -1n Combine like terms: n + -1n = 0 12 + 2n = 20 + 0 12 + 2n = 20 Add '-12' to each side of the equation. 12 + -12 + 2n = 20 + -12 Combine like terms: 12 + -12 = 0 0 + 2n = 20 + -12 2n = 20 + -12 Combine like terms: 20 + -12 = 8 2n = 8 Divide each side by '2'. n = 4 Simplifying n = 4
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