tìm x (3 4/5 -2x).1 1/3=5 5/7

Đáp án:`+`Giải thích các bước giải:

`(3 4/5 -2x).1 1/3=5 5/7`

`=>(19/5-2x)` . `4/3=40/7`

`=>19/5-2x=40/7:4/3`

`=>19/5-2x=40/7` . `3/4`

`=>19/5-2x=30/7`

`=>2x=19/5-30/7`

`=>2x=133/35-150/35`

`=>2x=-17/35`

`=>x=-17/35:2`

`=>x=-17/70`

Vậy `x=-17/70`

`(3 4/5 - 2x ) . 1 1/3 = 5 5/7`

`=> ( 19/5 - 2x ) . 4/3 = 40/7`

`=> 19/5 - 2x = 40/7 : 4/3`

`=> 19/5 - 2x = 30/7`

`=> 2x = 19/5 - 30/7`

`=> 2x = -17/35`

`=> x = -17/35 : 2`

`=> x = -17/70`

Vậy `x = -17/70`

`#dtkc`