/5/4x-2/ : 7/6 = 3/4
/5/4-2/ = 7/8
TH1 : 5/4x-2 = 7/8
=> 5/4x = 23/8
=> x = 23/10
TH2
5/4x-2 = -7/8
=> 5/4x = 9/8
=> x = 9/10
Vậy x = 9/10; 23/10
=>|5/4x-2|:7/6=3-9/4=3/4
=>|5/4x-2|=3/4.7/6=7/8
=>5/4x-2=7/8=>5/4x=23/8=>x=23/1
hoặc 5/4x-2=-7/8=>5/4x=9/8=>x=9/10