Question

n/2-3n/4+5/6=21 linear equation​

Answer 1

$\frac{n}{2} - \frac{3n}{4} + \frac{5}{6} = 21 \\ take \: l.c.m \: of \: 2 \: 4 \: 6 = 12 \\ \frac{6n - 9n + 10}{12} = 21 \\ - 3n = (21 \times 12) - 10 \\ - 3n = 242 \\ n = - 80.67 \: approx. \\ hope \: it \: helps \: you$