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Simplifying 2n + -1 = 20 + n Reorder the terms: -1 + 2n = 20 + n Solving -1 + 2n = 20 + n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. -1 + 2n + -1n = 20 + n + -1n Combine like terms: 2n + -1n = 1n -1 + 1n = 20 + n + -1n Combine like terms: n + -1n = 0 -1 + 1n = 20 + 0 -1 + 1n = 20 Add '1' to each side of the equation. -1 + 1 + 1n = 20 + 1 Combine like terms: -1 + 1 = 0 0 + 1n = 20 + 1 1n = 20 + 1 Combine like terms: 20 + 1 = 21 1n = 21 Divide each side by '1'. n = 21 Simplifying n = 21
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