$\dfrac{0,1(6) + 0,(3)}{0,(3) + 1,1(6)}$ `. x = 0,(2)`
`=> {1/6 + 1/3}/{1/3 + 7/6} . x =2/9`
`=> {1/10 . 5/3 + 1/3}/{1/3 + 1/10 . 35/3} . x =2/9`
`=> {1/2}/{3/2} . x = 2/9`
`=> 1/3 . x = 2/9`
`=> x = 2/9 : 1/3`
`=> x = 2/9 . 3`
`=> x = 2/3`
Vậy `: x =2/3`