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Simplifying -31 = -2n + 7 Reorder the terms: -31 = 7 + -2n Solving -31 = 7 + -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. -31 + 2n = 7 + -2n + 2n Combine like terms: -2n + 2n = 0 -31 + 2n = 7 + 0 -31 + 2n = 7 Add '31' to each side of the equation. -31 + 31 + 2n = 7 + 31 Combine like terms: -31 + 31 = 0 0 + 2n = 7 + 31 2n = 7 + 31 Combine like terms: 7 + 31 = 38 2n = 38 Divide each side by '2'. n = 19 Simplifying n = 19
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