(-3/7).5/11+(-5/14).5/14 (-5/9).3/11+(-13/18).3/11 49/4:4/3+17/4:(-4/3) -4/5+5/2.x=-3/10 4/3+5/8:x=1/12

Giải thích các bước giải:

`(-3/7).5/11+(-5/14).{5}/14`

`=-15/77-25/196`

`=-145/2156`
`(-5/9).3/11+(-13/18).{3}/11`

`=(-5/9-13/18).{3}/11`

`=-23/{18}.{3}/11`

`=-23/66`
`49/4:4/3+17/4:(-4/3)`

`=49/4:4/3-17/4:(4/3)`

`=(49/4-17/4)÷4/3`

`=8÷4/3`

`=6`
`-4/5+5/2.x=-3/10`

`⇒5/2.x=-3/10-4/5`

`⇒5/2x=-11/10`

`⇒x=-11/10÷5/2`

`⇒x=-11/25`
`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`

Bạn tham khảo ạ !