Question

|6x+2|-2x=4 

Answer 1

`|6x+2|-2x=4`

`@TH1:6x+2 >= 0<=>x >= [-1]/3 =>|6x+2|=6x+2`

   `=>6x+2-2x=4`

`<=>4x=2`

`<=>x=1/2` (t/m)

`@TH2:6x+2 < 0<=>x < [-1]/3 =>|6x+2|=-6x-2`

    `=>-6x-2-2x=4`

`<=>-8x=6`

`<=>x=[-3]/4` (t/m)

Vậy `S={1/2;[-3]/4}`

Answer 2

TK ==========

https://www.mathway.com/vi/Algebra?asciimath=%7C6x%2B2%7C-2x%3D4