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Simplifying -31 = -3n + 9 + 2n Reorder the terms: -31 = 9 + -3n + 2n Combine like terms: -3n + 2n = -1n -31 = 9 + -1n Solving -31 = 9 + -1n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add 'n' to each side of the equation. -31 + n = 9 + -1n + n Combine like terms: -1n + n = 0 -31 + n = 9 + 0 -31 + n = 9 Add '31' to each side of the equation. -31 + 31 + n = 9 + 31 Combine like terms: -31 + 31 = 0 0 + n = 9 + 31 n = 9 + 31 Combine like terms: 9 + 31 = 40 n = 40 Simplifying n = 40
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