`a) 2020 : x + 23 = 528`
`2020 : x = 528 - 23`
`2020 : x = 505`
`x = 2020 : 505`
`x=4`
Vậy `x = 4`
``
`b) x + 9,44= 18,36`
`x = 18.36 - 9.44`
`x= 8,92`
Vậy `x = 8,92`
``
`c) 61/24 + x = 3/4`
`x = 3/4 - 61/24`
`x= 16/24 - 61/24`
`=-43/24`
``
`d) x : 2/5 = 1/6 : 2/5`
`x : 2/5 = 5/12`
`x = 5/12 . 2/5`
`x= 1/6`
Vậy `x = 1/6`
``
`e) 2 - ( 5 3/8 + x - 7 5/24) : 16 2/3 = 0`
` ( 5 3/8 + x - 7 5/24) : 16 2/3 = 2 - 0`
` ( 5 3/8 + x - 7 5/24) : 16 2/3 = 2`
` ( 5 3/8 + x - 7 5/24) = 2 . 16 2/3`
`43/8 + x - 173/24= 100/3`
`43/8 + x = 100/3 + 173/24`
`43/8 + x = 973/24`
`x = 973/24 - 43/8`
`x= 211/6`
