What is:

Question

3/4n - 18 = 1/4n - 4?

Answer 1

Group the n's together:
3/4n -1/4n = 18-4

Subtract:
2/4n = 14

Divide both sides by (2/4) to get n alone:
(2/4n)/ (2/4) = 14/(2/4)

n = 28