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Simplifying 3n + -21 = 2n + -1 Reorder the terms: -21 + 3n = 2n + -1 Reorder the terms: -21 + 3n = -1 + 2n Solving -21 + 3n = -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. -21 + 3n + -2n = -1 + 2n + -2n Combine like terms: 3n + -2n = 1n -21 + 1n = -1 + 2n + -2n Combine like terms: 2n + -2n = 0 -21 + 1n = -1 + 0 -21 + 1n = -1 Add '21' to each side of the equation. -21 + 21 + 1n = -1 + 21 Combine like terms: -21 + 21 = 0 0 + 1n = -1 + 21 1n = -1 + 21 Combine like terms: -1 + 21 = 20 1n = 20 Divide each side by '1'. n = 20 Simplifying n = 20
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