Question

tìm x 

x-1.2/5=3

Answer 1

`x-1. 2/5=3`

`x-2/5=3`

`x=3+2/5`

`x=15/5+2/5=17/5`

Hoặc

`x-1 2/5=3`

`x-7/5=3`

`x=3+7/5`

`x=15/5+7/5=22/5`

Answer 2

` x - 1 . 2/5 = 3`

` x -2/5 = 3`

` x = 3 + 2/5`

` x = 17/5`

Answer 3

`x - 1 . 2/5 = 3`

`=> x - 2/5 = 3`

`=> x         = 3 + 2/5`

`=> x         = 17/5`