Tìm x a)5/3 x X - 2/3 = 1/3 b)5/3 - X x 2/3 = 1/3 c) X + 7/8 x 16/21= 3/2

`a)` `5/3` $\times$ `x - 2/3 = 1/3`
`5/3` $\times$ `x=1/3+2/3`
`5/3` $\times$ `x=1`
`x=1:5/3`
`x=3/5`
Vậy `x=3/5`
_____________________
`b)` `5/3 - x` $\times$ `2/3 = 1/3`
`x` $\times$ `2/3 = 5/3 - 1/3`
`x` $\times$ `2/3 = 4/3`
`x=4/3 : 2/3`
`x=2`
Vậy `x=2`
_______________________
`c)` `x+7/8` $\times$ `16/21 = 3/2`
`x+2/3 = 3/2`
`x=3/2 - 2/3`
`x=5/6`
Vậy `x=5/6`

`KT`