tìm x: 8x - 2 = 6x - 9

$\text{8x-2=6x-9}$

$\text{⇒8x-6x=-9+2}$

$\text{⇒2x=-7}$

$\text{⇒x=$\dfrac{-7}{2}$}$

$\text{Vậy x=-$\dfrac{7}{2}$}$