`a) -5/4 - x = -1/4`
`x = -5/4 - (-1/4)`
`x = -1`
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`b) -2/3 + (x + 1/2) = -5/3`
`( x + 1/2) = -5/3 - (-2/3)`
`x+ 1/2 = -1`
`x = -1 - 1/2`
`x = -3/2`
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`c) (-3/4 - x) - 2/3 = -1/3`
`( -3/4 - x) = -1/3 + 2/3`
`-3/4 - x = 1/3`
`x =-3/4 - 1/3`
`x =-13/12`
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`d) 1/2 : x + \frac{-3}{4} = -5/4`
`1/2 : x = -5/4 - \frac{-3}{4}`
`1/2 : x = -1/2`
`x = 1/2 : (-1/2)`
`x =-1`
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`e) -4/3 + 1/3 . ( x - 3/2) = 2/3`
`1/3 . ( x - 3/2)= 2/3 - (-4/3)`
`1/3 . ( x - 3/2)= 2`
`( x - 3/2) = 2 : 1/3`
`x - 3/2 = 6`
`x = 6 + 3/2`
`x = 15/2`
