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in Linear Equations by (58.8k points)

If n/2-3n/4+5n/6=21, then n=?

(a) 30 (b) 42 (c) 36 (d) 28

1 Answer

+1 vote
by (44.3k points)
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Best answer

(c) 36

Explanation:

Given n/2-3n/4+5n/6=21

On rearranging and taking L.C.M,

(6n_9n+10n)/12=21

7n=21(12)

n=36

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