a,X+4/9=5/2+1/3 b,4/5-X=1/5×2/3 c,3-Xx1/2=1/3 lưu ý ; tìm X nha

Giải thích các bước giải:

 a) X + `4/9` = `5/2` + `1/3`

     X + `4/9` = `17/6`

     X = `17/6` – `4/9` = `43/18`

 b)`4/5` – X = `1/5` x `2/3`

    `4/5` – X = `2/15`

    X = `4/5` – `2/15`= `2/3`

 c)3 – X x `1/2` = `1/3`

   X x `1/2` = 3 – `1/3` = `8/3`

   X = `8/3` : `1/2`= `16/3`