-2/5x-1/3=3/4
-2/5x=3/4+1/3
-2/5x = 13/12
x=13/12:2/5
x=-65/24
-13/20x+1/2=-2/5
-13/20x=-2/5-1/2
-13/20x=-9/10
x=-9/10:13/20
x=-18/13
4/3-|2x-1/2|=1
|2x-1/2|=1-4/3
|2x-1/2|=-1/3
<=> 2x-1/2=1/3 hoặc 2x-1/2=-1/3
TH1:
2x-1/2=1/3
2x=1/3+1/2
2x=5/6
x=5/6:2
x=5/12
TH2:
2x-1/2=-1/3
2x=-1/3+1/2
2x=1/6
x=1/6:2
x=1/12