`a)-3/5 - x = -0,75 - 3x`
`-x + 3x = -0,75 + 3/5`
`2x = -3/4 + 3/5`
`2x =-3/20`
`x = -3/20 : 2`
`x= -3/40`
Vậy `x = -3/40`
``
`b) -1,25 + 2/15 - x = 2`
`-5/4 + 2/15 - x = 2`
`-67/60 - x = 2`
`x = -67/60 - 2`
`x=-187/60`
Vậy `x = -187/60`
``
`c) 17/6 - ( x - 7/6) = 7/4`
`( x - 7/6) = 17/6 - 7/4`
`x - 7/6 = 13/12`
`x = 13/12 + 7/6`
`x= 9/4`
``
`d) 9/2 - [ 2/3 - ( x + 7/4)] = -1 1/4`
`9/2 - [ 2/3 - ( x + 7/4)] = -5/4`
` [ 2/3 - ( x + 7/4)] = 9/2 - (-5/4)`
` 2/3 - ( x + 7/4) = 23/4`
`( x + 7/4) = 2/3 - 23/4`
`x + 7/4 =-61/12`
`x = -61/12 - 7/4`
`x=-41/6`