Giúp mình với ạ các bạn

`a,`

`3/5 - 1/4 = 1/10x - 1/2`

`⇒ 12/20 - 5/20 = 1/10x - 10/20`

`⇒ 7/20 = 1/10x - 10/20`

`⇒ 1/10 x = 7/20 + 10/20`

`⇒ 1/10 x = 17/20`

`⇒ x = 17/2`

Vậy `x = 17/2`

`c,`

`1 8/35 - 1 1/5 x = 3/7`

`⇒ 43/35 - 6/5 x = 3/7`

`⇒ 6/5 x = 43/35 - 3/7`

`⇒ 6/5 x = 43/35 - 15/35`

`⇒ 6/5 x = 4/5`

`⇒ x = 2/3`

Vậy `x = 2/3`

`e,`

`2x - 2/3 - 7x = 3/2 - 1`

`⇒ -5x = 3/2 - 1 + 2/3`

`⇒ -5x = 9/6 - 6/6 + 4/6`

`⇒ -5x = 7/6`

`⇒ x = -7/30`

Vậy `x = -7/30`