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Simplifying 12 + n = 20 + -2n Solving 12 + n = 20 + -2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2n' to each side of the equation. 12 + n + 2n = 20 + -2n + 2n Combine like terms: n + 2n = 3n 12 + 3n = 20 + -2n + 2n Combine like terms: -2n + 2n = 0 12 + 3n = 20 + 0 12 + 3n = 20 Add '-12' to each side of the equation. 12 + -12 + 3n = 20 + -12 Combine like terms: 12 + -12 = 0 0 + 3n = 20 + -12 3n = 20 + -12 Combine like terms: 20 + -12 = 8 3n = 8 Divide each side by '3'. n = 2.666666667 Simplifying n = 2.666666667
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