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Simplifying n + 27 + -3n = 21 Reorder the terms: 27 + n + -3n = 21 Combine like terms: n + -3n = -2n 27 + -2n = 21 Solving 27 + -2n = 21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + -2n = 21 + -27 Combine like terms: 27 + -27 = 0 0 + -2n = 21 + -27 -2n = 21 + -27 Combine like terms: 21 + -27 = -6 -2n = -6 Divide each side by '-2'. n = 3 Simplifying n = 3
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