`a, x +4,32 = 8,67`
`x = 8,67 - 4,32`
`x = 4,35`
$\text{Vậy}$ `x = 4,35`
--------------------------
`b, x - 3,64 = 5,86`
`x = 5,86 + 3,64`
`x = 9,5`
$\text{Vậy}$ `x = 9,5`
----------------------------
`c, x` $\text{x}$ `0,34 = 1,19` $\text{x 1,02}$
`x` $\text{x}$ `0,34 = 1,2138`
`x = 1,2138 : 0,34`
`x= 3,57`
$\text{Vậy}$ `x= 3,57`
--------------------------
`d, x - 2,751 = 6,3` $\text{x 2,4}$
`x - 2,751 = 15,12`
`x = 15,12 + 2,751`
`x = 17,871`
$\text{Vậy}$ `x = 17,871`
------------------------
`e, x - 1,27 = 13,5 : 4,5`
`x - 1,27 = 3`
`x = 3 + 1,27`
`x = 4,27`
$\text{Vậy}$ `x = 4,27`
-------------------------
`g, x +18,7 = 50,5 : 2,5`
`x + 18,7 = 20,2`
`x = 20,2 - 18,7`
`x= 1,5`
$\text{Vậy}$ `x= 1,5`
------------------------
`h, 53,2 : ( x - 3,5) + 45 ,8 = 99`
`53 , 2 : ( x - 3,5) = 99 - 45,8`
`53,2 : ( x -3,5) = 53,2`
`x - 3,5 = 53,2 : 53,2`
`x - 3,5 = 1`
`x = 1 + 3,5`
`x = 4,5`
$\text{Vậy}$ `x = 4,5`
----------------------------
`i, 4,25 x (x + 41,53) - 125 = 53,5`
`4,25 x (x + 41,53) = 53,5 + 125`
`4,25 x (x + 41,53) = 178,5`
`x + 41,53 = 178,5 : 4,25`
`x + 41,53 = 42`
`x = 42 - 41,53`
`x = 0,47`
$\text{Vậy}$ `x = 0,47`
