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Simplifying 21 = 20n + 2n + -1 Reorder the terms: 21 = -1 + 20n + 2n Combine like terms: 20n + 2n = 22n 21 = -1 + 22n Solving 21 = -1 + 22n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-22n' to each side of the equation. 21 + -22n = -1 + 22n + -22n Combine like terms: 22n + -22n = 0 21 + -22n = -1 + 0 21 + -22n = -1 Add '-21' to each side of the equation. 21 + -21 + -22n = -1 + -21 Combine like terms: 21 + -21 = 0 0 + -22n = -1 + -21 -22n = -1 + -21 Combine like terms: -1 + -21 = -22 -22n = -22 Divide each side by '-22'. n = 1 Simplifying n = 1
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