solve for x?

Due to poor presentation question may be read in many ways.

What troubles me is that you may mean:-
Question 3
(4x + 5) / 6 = (5x - 125) / 3
4x + 5 = 10x - 250
255 = 6x
x = 255 / 6

Of course you could mean:-
(i) 3.4x + (5/6) = 5x - 125/3
(ii) (3.4x + 5)/6 = (5x - 125) / 3
(iii) 4x + 5/6 = 5x - 125/3
etc etc!!!!!!!

Moral behind story----use brackets !!!!!

3.4x + 5/6 = (5x - 125)/3
6(3.4x + 5/6) = 6[(5x - 125)/3]
20.4x + 5 = 5x - 125
20.4x - 5x = -5 - 125
15.4x = -130
x = -130/15.4
x = -1300/154
x = -650/77