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Question -

Solve the linear equations.
 n/2 – 3n/4 + 5n/6 = 21



Answer -

n/2 – 3n/4 + 5n/6 = 21
⇒ (6n – 9n + 10n)/12 = 21
⇒ 7n/12 = 21
⇒ 7n = 21 × 12
⇒ n = 252/7
⇒ n = 36

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