Question

Answer 1

`(x - 2)/3 = (x + 1)/4`

`<=> (x - 2) . 3 = (x + 1) . 4`

`<=> 4x . 3 = (x + 1) . 4`

`<=> (4 - 3)x = 11`

`<=> x = 11`

Vậy `x = 11`

Answer 2

`[ x - 2 ] / 3 = [ x + 1 ] / 4`

`4 ( x - 2 ) = 3 ( x + 1 )`

`4x - 8 = 3x + 3`

`4x - 3x = 3 + 8`

`x = 11`

Answer 3

\(\Leftrightarrow4\left(x-2\right)=3\left(x+1\right)\)

\(\Leftrightarrow4x-8-3x-3=0\)

\(\Leftrightarrow x-11=0\)

\(\Leftrightarrow x=11\)

Answer 4

\(=>4x-8=3x+3\)

\(=>4x-3x=3+8\)

\(=>x=11\)