`a) 1/2x - 3/4 = 3/2`
`=> 1/2x = 9/4`
`=> x = 9/4 . 2`
`=> x = 9/2`
`b) 0,125 . (-3,7) . (-2)^3`
`= 1/8 . (-37)/10 . (-8)`
`= 1/8 . (-8) . (-37)/10`
`= -1 . (-37)/10`
`= 37/10`
`c) \sqrt{36} . \sqrt{81/16} + 3/4`
`= 6 . 9/4 + 3/4`
`= 27/2 + 3/4`
`= 57/4`
`d) 3/7 [(3 1/2 - 3 2/3) : 1/14]`
`= 3/7 [(7/2 - 11/3) . 14]`
`= 3/7 [(-1/6) . 14]`
`= 3/7 . (-7)/3`
`= -1`
`e) \sqrt{4/81} : \sqrt{25/81} - 1 2/5`
`= 2/9 : 5/9 - 1 2/5`
`= 2/9 . 9/5 - (1 + 2/5)`
`= 2/5 - 1 - 2/5`
`= 2/5- 2/5 - 1`
`= 0 - 1`
`= -1`
(Chúc bạn học tốt)