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Simplifying 3(n + 21) = 2n + 23 Reorder the terms: 3(21 + n) = 2n + 23 (21 * 3 + n * 3) = 2n + 23 (63 + 3n) = 2n + 23 Reorder the terms: 63 + 3n = 23 + 2n Solving 63 + 3n = 23 + 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. 63 + 3n + -2n = 23 + 2n + -2n Combine like terms: 3n + -2n = 1n 63 + 1n = 23 + 2n + -2n Combine like terms: 2n + -2n = 0 63 + 1n = 23 + 0 63 + 1n = 23 Add '-63' to each side of the equation. 63 + -63 + 1n = 23 + -63 Combine like terms: 63 + -63 = 0 0 + 1n = 23 + -63 1n = 23 + -63 Combine like terms: 23 + -63 = -40 1n = -40 Divide each side by '1'. n = -40 Simplifying n = -40
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