giúp em vs ạ! hứa vote cho 5 sao + c.ơn ạ

Đáp án+Giải thích các bước giải:

 d) `( 5/6 - 1/3 ) : 13/64 + 1/2 x 80/15`

` = 1/2 . 64/13 + 1/2 x 16/3 `

`= 32/13 + 8/3`

`= 353/99`

Bài 2 :

`a) 5 . x + 1 /2 = 1 2/3`

5x = 5/3 - 1/2`

`5x = 7/6`

`x = 7/30`

`b) 2 1/2 - 2 ( 1/3 - x ) = 3

`5/2 - 2/3 + 2x = 3`

`11/6 - 2x = 3`

`2x = 11/6 - 3`

`2x = -7/6`

`x = -7/12`

`c) 5. ( x - 1/10 ) . 1 1/2 = 7/4`

`( 5x - 1/2 ) . 3/2 = 7/4`

`5x - 1/2 = 7/4 : 3/2`

`5x - 12 = 7/6`

`5x = 79/6`

`x = 79/30`