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Multiple choice

Solve the linear equation: $\displaystyle \dfrac{n}{2} - \dfrac{3n}{4} + \dfrac{5n}{6} = 21$

  1. $n = 22$
  2. $n = 33$
  3. $n = 29$
  4. $n = 36$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Find a common denominator for the fractions: 12. (6n - 9n + 10n) / 12 = 21. 7n / 12 = 21. 7n = 252. n = 36.

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