Solve 3/4 - 1/x = 1/(2x)?

3/4(4x)-1/x(4x)=1/2x(4x)
3x -4 =2
3x =2+4
3x =6
x =6/3
=2

x=2

6x - 8 = 4
6x = 12
x = 2

Unlike many,you produced a very clear question by using brackets---well done.

3/4 - 1/x = 1/(2x)
-1/(2x) - 1/x = -3/4
4x[-1/(2x) - 1/x] = 4x[-3/4]
-2 - 4 = -3x
3x = 2 + 4
3x = 6
x = 6/3
x = 2

x=2