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Simplifying 7n + -18 = 31 Reorder the terms: -18 + 7n = 31 Solving -18 + 7n = 31 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 7n = 31 + 18 Combine like terms: -18 + 18 = 0 0 + 7n = 31 + 18 7n = 31 + 18 Combine like terms: 31 + 18 = 49 7n = 49 Divide each side by '7'. n = 7 Simplifying n = 7
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