`y . 1/3 : 2/9 + y : 2 = 255`
`=> y . 1/3 . 9/2 + y . 1/2 = 255`
`=>y . 3/2 + y . 1/2 = 255`
`=>y . (3/2+1/2)=255`
`=>y . 2=255`
`=>y=255:2`
`=>y=255/2`
y . \(\dfrac{1}{3}:\dfrac{2}{8}\) + y : 2 = 255
<=> \(y.\dfrac{3}{2}+\dfrac{y}{2}=255\)
<=> \(\dfrac{3y}{2}+\dfrac{y}{2}=\dfrac{510}{2}\)
<=> 3y + y = 510
<=> 4y = 510
<=> y = \(\dfrac{255}{2}\)
\(y\cdot\dfrac{1}{3}:\dfrac{2}{9}+y:2=255\)
\(\Leftrightarrow y\left(\dfrac{1}{3}\cdot\dfrac{2}{9}+\dfrac{1}{2}\right)=255\)
hay \(y=\dfrac{13770}{31}\)
