use the photo to solve the problem!!

[tex] \frac{3ax - n}{5} = - 4[/tex]
[tex]3ax - n = - 4 \times 5[/tex]
[tex]3ax - n = - 20[/tex]
[tex]3ax = n - 20[/tex]
[tex]x = \frac{n - 20}{3a} [/tex]
Answer:
[tex]x = \frac{n - 20}{3a} [/tex]
Hope you could understand.
If you have any query, feel free to ask.