Question

n/2 - 3n/4 + 5n/6 = 21 then find the value of n

Answer 1

Answer:

$(n \div 2) - (3n \div 4) + (5n \div 6) = 21$

taking LCM

we get :-

6n - 9n + 10n = 21 * 12

7n = 21 * 12

n = 3 * 12

n = 36