Question

please explain step by step n/3- 3n/4+5n/6=21​

Answer 1

Answer:

hope i am correct, and it helps

Answer 2

$\frac{n}{3} - \frac{3n}{4} + \frac{5n}{6} = 21 \\ \\ \frac{4n - 9n + 10n}{12} = 21 \\ \\ 14n - 9n = 21 \times 12 \\ \\ 5n = 252 \\ \\ n = \frac{252}{5} \\ \\ n = 50.4$