Giải giúp mik vs hạn là 1h30

`#huy`

`1)`

`a)16/7-x=4/5-3/10`

`16/7-x=1/2`

`x=16/7-1/2`

`x=25/14`

`b)1/20-(x-8/5)=1/10`

`x-8/5=1/20-1/10=(-1)/20`

`x=(-1)/20+8/5`

`x=21/20`

`2)`

`a)1/3-x=5/6-1/4`

`1/3-x=7/12`

`x=1/3-7/12`

`x=(-1)/4`

`b)1/10-(x-3/25)=1/50`

`x-3/25=2/25`

`x=2/25+3/25`

`x=1/5`

`3)`

`a)(-4)/5+5/2.x=(-3)/10`

`5/2.x=(-3)/10-(-4)/5`

`5/2.x=1/2`

`x=1/2:5/2`

`x=1/5`

`b)4/3+5/8:x=1/12`

`5/8:x=1/12-4/3`

`5/8:x=(-5)/4`

`x=5/8:(-5)/4`

`x=(-1)/2`

`c)(x-1/3).(x+2/5)=0`

TH1:

`x-1/3=0`

`x=0+1/3`

`x=1/3`

TH2:

`x+2/5=0`

`x=0-2/5`

`x=(-2)/5`

Vậy `x=1/3` hoặc `x=(-2)/5`

`d)(3/4x-9/16).(1,5+(-3)/5:x)=0`

TH1:

`3/4x-9/16=0`

`3/4x=0+9/16=9/16`

`x=9/16:3/4`

`x=3/4`

TH2:

`1,5+(-3)/5:x=0`

`15/10+(-3)/5:x=0`

`(-3)/5:x=0-15/10=(-3)/2`

`x=(-3)/2.(-3)/5`

`x=9/10`

Vậy `x=3/4` hoặc `x=9/10`