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Simplifying -1 + 2(-1 + 7n) = -31 -1 + (-1 * 2 + 7n * 2) = -31 -1 + (-2 + 14n) = -31 Combine like terms: -1 + -2 = -3 -3 + 14n = -31 Solving -3 + 14n = -31 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 14n = -31 + 3 Combine like terms: -3 + 3 = 0 0 + 14n = -31 + 3 14n = -31 + 3 Combine like terms: -31 + 3 = -28 14n = -28 Divide each side by '14'. n = -2 Simplifying n = -2
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