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Simplifying 21n + 6(n + -2) = 42 Reorder the terms: 21n + 6(-2 + n) = 42 21n + (-2 * 6 + n * 6) = 42 21n + (-12 + 6n) = 42 Reorder the terms: -12 + 21n + 6n = 42 Combine like terms: 21n + 6n = 27n -12 + 27n = 42 Solving -12 + 27n = 42 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 27n = 42 + 12 Combine like terms: -12 + 12 = 0 0 + 27n = 42 + 12 27n = 42 + 12 Combine like terms: 42 + 12 = 54 27n = 54 Divide each side by '27'. n = 2 Simplifying n = 2
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