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Simplifying 29n + -18n + 21 = 87 Reorder the terms: 21 + 29n + -18n = 87 Combine like terms: 29n + -18n = 11n 21 + 11n = 87 Solving 21 + 11n = 87 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 11n = 87 + -21 Combine like terms: 21 + -21 = 0 0 + 11n = 87 + -21 11n = 87 + -21 Combine like terms: 87 + -21 = 66 11n = 66 Divide each side by '11'. n = 6 Simplifying n = 6
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