`(4 1/5-y)xx1 1/14=9/14+5/7`
`(21/5-y)xx15/14=19/14`
`21/5-y=19/14:15/14`
`21/5-y=19/15`
`y=21/5-19/15`
`y=44/15`
\(\left(4\dfrac{1}{5}-y\right)\cdot1\dfrac{1}{4}=\dfrac{9}{14}+\dfrac{5}{7}\)
\(\left(\dfrac{21}{5}-y\right)\cdot\dfrac{5}{4}=\dfrac{19}{14}\)
\(\dfrac{21}{5}-y=\dfrac{19}{14}:\dfrac{5}{4}\)
\(\dfrac{21}{5}-y=\dfrac{38}{35}\)
\(y=\dfrac{21}{5}-\dfrac{38}{35}\)
\(y=\dfrac{109}{35}\)