2:
a: =>9/4:|x+1/3|=4,5
=>|x+1/3|=1/2
=>x+1/3=1/2 hoặc x+1/3=-1/2
=>x=-5/6 hoặc x=1/6
b: =>11/4+3/2:|4x-1/5|=7/2
=>3/2:|4x-1/5|=14/4-11/4=3/4
=>|4x-1/5|=2
=>4x-0,2=2 hoặc 4x-0,2=-2
=>x=-0,45 hoặc x=0,55
c: =>2,5:|3/4x+1/2|=15/4-3=3/4
=>|3/4x+1/2|=5/2:3/4=5/2*4/3=20/6=10/3
=>3/4x+1/2=10/3 hoặc 3/4x+1/2=-10/3
=>x=34/9 hoặc x=-46/9
d: =>3:|1/4x-2/3|=6-21/5=9/5
=>|1/4x-2/3|=3:9/5=5/3
=>1/4x-2/3=5/3 hoặc 1/4x-2/3=-5/3
=>1/4x=7/3 hoặc 1/4x=-1
=>x=-4 hoặc x=28/3
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