2 câu trả lời
`-( x - 3 ) = 2x + 4 `
`<=> 3 - x = 2x + 4`
`<=> 2x + x = 3 - 4`
`<=> 3x = -1`
`<=> x = ( -1 ) : 3`
`<=> x = -1/3`
$Vậy$ `x = -1/3`
` -(x-3) = 2x+4`
`-x + 3 = 2x +4`
` -x - 2x = 4+ (-3)`
` -3.x = 1`
`=> x =` $\frac{-1}{3}$
@UCKSWT
`-( x - 3 ) = 2x + 4 `
`<=> 3 - x = 2x + 4`
`<=> 2x + x = 3 - 4`
`<=> 3x = -1`
`<=> x = ( -1 ) : 3`
`<=> x = -1/3`
$Vậy$ `x = -1/3`
` -(x-3) = 2x+4`
`-x + 3 = 2x +4`
` -x - 2x = 4+ (-3)`
` -3.x = 1`
`=> x =` $\frac{-1}{3}$
@UCKSWT
