first you start off by subtracting 5/6 from each side
x/4=1/2 - 5/6 (find the least common deminator which in this case is 6)
6 goes into 2 3 times, 3 times 1 is 3
6 goes into 6 1 time, 1 time 5 is 5
(3-5)/6
-2/6 = x/4
you can simplyfy -2/6 into -1/3 (dividing the top and bottom by 2)
now you want to get the x by itself so you multiply 4 to each side
4(-1/3)=x/4(4)
-4/3 = x is your answer