a. 3x+4x-5x = -6 => (3+4-5).x = -6 => 2x = -6 => x = -6 : 2 => x = -3 vậy x = -3 b. 2(x-3)+4x = 18 => 2x-6=4x = 18 => (2x+4x)-6 = 18 => 6x = 24 => x = 24 :6 => x = 4 vậy x = 4 Bình luận
`3x+4x-5x=-6` `=> (3+4-5)x = -6` `=> 2x = -6` `=> x = -6:2` `=> x = -3` `2(x-3)+4x=18` `=> 2x – 6 + 4x = 18` `=> (2x + 4x) – 6 = 18` `=> 6x = 18+6` `=> 6x = 24` `=> x = 24 : 6` `=> x = 4` (Chúc bạn hok tốt ạ) Bình luận
a. 3x+4x-5x = -6
=> (3+4-5).x = -6
=> 2x = -6
=> x = -6 : 2
=> x = -3
vậy x = -3
b. 2(x-3)+4x = 18
=> 2x-6=4x = 18
=> (2x+4x)-6 = 18
=> 6x = 24
=> x = 24 :6
=> x = 4
vậy x = 4
`3x+4x-5x=-6`
`=> (3+4-5)x = -6`
`=> 2x = -6`
`=> x = -6:2`
`=> x = -3`
`2(x-3)+4x=18`
`=> 2x – 6 + 4x = 18`
`=> (2x + 4x) – 6 = 18`
`=> 6x = 18+6`
`=> 6x = 24`
`=> x = 24 : 6`
`=> x = 4`
(Chúc bạn hok tốt ạ)