Ответ:

\[2.2(22.3-y)=6.5,\]

\[22.3-y=6.5:2.2=\frac{65}{22},\]

\[y=22.3-\frac{65}{22}=\frac{213}{11}=19\frac{4}{11}.\]

Ответ: \(y=19\frac{4}{11}\).