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Simplifying 20 + n = 2n + -1 Reorder the terms: 20 + n = -1 + 2n Solving 20 + n = -1 + 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. 20 + n + -2n = -1 + 2n + -2n Combine like terms: n + -2n = -1n 20 + -1n = -1 + 2n + -2n Combine like terms: 2n + -2n = 0 20 + -1n = -1 + 0 20 + -1n = -1 Add '-20' to each side of the equation. 20 + -20 + -1n = -1 + -20 Combine like terms: 20 + -20 = 0 0 + -1n = -1 + -20 -1n = -1 + -20 Combine like terms: -1 + -20 = -21 -1n = -21 Divide each side by '-1'. n = 21 Simplifying n = 21
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