=>3/4x-9/16=0 hoặc 1,5-3/5:x=0
=>3/4x=9/16 hoặc 3/5:x=3/2
=>x=3/4 hoặc x=3/5:3/2=2/5
`(3/4x - 9/16).(1,5 +(-3/5):x)=0`
`(3/4x - 9/16).(1,5-3/5:x)=0`
`@TH1:`
`3/4 x -9/16=0`
`3/4 x =0 +9/16`
`3/4x = 9/16`
`x=9/16:3/4`
`x=9/16 xx 4/3`
`x=3/4`
`@TH2:`
`1,5-3/5:x=0`
`3/5:x=1,5-0`
`3/5:x=1,5`
`x=3/5:1,5`
`x=3/5 :3/2`
`x=3/5 xx 2/3`
`x=2/5`
Vậy `x={3/4;2/5}`