Tìm x : 3/4x - 2/3x = 7/12

2 câu trả lời

`3/4x-2/3x=7/12`

`⇔(3/4-2/3).x= 7/12`

`⇔1/12.x=7/12`

`⇔x=7/12:1/12`

`⇔x=7/12 . 12/1`

`⇔x=84/12=7`

`=>`Vậy `x=7`

`3/4 x - 2/3 x = 7/12`

`=> ( 3/4 - 2/3 )x = 7/12`

`=> 1/12 x = 7/12`

`=> x = 7/12 : 1/12`

`=> x = 7`

 $Vậy$ `x = 7`