Tìm x 5sao và câi trả lời hay nhất

`#Yaii `

`8)5/12x+3=1/3-7/12x `

`<=>5/12x+7/12x=-3+1/3 `

`<=>x=-8/3 `

`=> ` Vậy `x=-8/3 `

`9)1/6x+1/10x-4/15x+1=0 `

`<=>0+1=0 `

`<=>0=-1(vô  lí) `

`=> ` Vậy `x∈ ` $\emptyset$

`4. `

`1)1/3x+2/5(x+1)=0 `

`<=>1/3x+2/5x+2/5=0 `

`<=>11/15x+2/5=0 `

`<=>11/15x=-2/5 `

`<=>x=-6/11 `

`=> ` Vậy `x=-6/11 `

`2)2x+1/5(x-5)=17/5 `

`<=>2x+1/5x-1=17/5 `

`<=>11/5x-1=17/5 `

`<=>11/5x=22/5 `

`<=>x=2 `

`=> ` Vậy `x=2 `

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

`<=>4x-2x-1=3-1/3+x `

`<=>4x-2x-x=1+3-1/3 `

`<=>x=11/3 `

`=> ` Vậy `x=11/3 `