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Simplifying 19n + -20 + n = 80 Reorder the terms: -20 + 19n + n = 80 Combine like terms: 19n + n = 20n -20 + 20n = 80 Solving -20 + 20n = 80 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + 20n = 80 + 20 Combine like terms: -20 + 20 = 0 0 + 20n = 80 + 20 20n = 80 + 20 Combine like terms: 80 + 20 = 100 20n = 100 Divide each side by '20'. n = 5 Simplifying n = 5
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