(-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

0 bình luận về “(-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”

1. 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 !

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2. `a,(-3/7).5/11+(-5/14).5/14`

   `=-15/77-25/196`

   `=-145/2156`

   `b,(-5/9).3/11+(-13/18). 3/11`

   `=(-5/9-13/18)*3/11`

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

   `=49/4*3/4-17/4*3/4`

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

   `=8*3/4`

   `=6`

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

   `⇒5/2x=-11/10`

   `<=>x=-11/10÷5/2`

   `<=>x=-11/25`

   Vậy ……..

   `e,4/3+5/8:x=1/12`

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

   `<=>5/8:x=-5/4`

   `<=>x=-1/2`

    Vậy ………………

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