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Simplifying -13 = -3 + n + 2n Combine like terms: n + 2n = 3n -13 = -3 + 3n Solving -13 = -3 + 3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3n' to each side of the equation. -13 + -3n = -3 + 3n + -3n Combine like terms: 3n + -3n = 0 -13 + -3n = -3 + 0 -13 + -3n = -3 Add '13' to each side of the equation. -13 + 13 + -3n = -3 + 13 Combine like terms: -13 + 13 = 0 0 + -3n = -3 + 13 -3n = -3 + 13 Combine like terms: -3 + 13 = 10 -3n = 10 Divide each side by '-3'. n = -3.333333333 Simplifying n = -3.333333333
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