nhanh giúo mik nhé đag vội

Đáp án`+`Giải thích các bước giải:

 `1) 17/6-(x-7/6)=7/4`

`17/6-x+7/6=7/4`

`(17/6+7/6)-x=7/4`

`4-x=7/4`

`x=4-7/4`

`x=9/4`

Vậy `x=9/4`

`2) 3/5x+2/3=4/5`

`3/5x=4/5-2/3`

`3/5x=2/15`

`x=2/15:3/5`

`x=2/9`

Vậy `x=2/9`

`3) 4/5-1/2:x=1/2`

`1/2:x=4/5-1/2`

`1/2:x=3/10`

`x=1/2:3/10`

`x=5/3`

Vậy `x=5/3`

`4) -11/12x+0,25=5/6`

`-11/12x=5/6-1/4`

`-11/12x=7/12`

`x=7/12:(-11/12)`

`x=-7/11`

Vậy `x=-7/11`

`5) 5/8+1/4 . (2x-1)=5/4`

`1/4.(2x-1)=5/4-5/8`

`1/4.(2x-1)=5/8`

`2x-1=5/8:1/4`

`2x-1=5/2`

`2x=5/2+1`

`2x=7/2`

`x=7/2:2`

`x=7/4`

Vậy `x=7/4`

`6) 8/7-1/7:(x/3-2)=-1`

`1/7:(x/3 - 2)=8/7+1`

`1/7:(x/3 -2)= 15/7`

`x/3 -2 =1/7 :15/7`

`x/3 -2=1/15`

`x/3=1/15+2`

`x/3=31/15`

`x:3=31/15`

`x=31/15 . 3`

`x=31/5`

Vậy `x=31/5`