Verified Answer :

\(\dfrac{1}{3}y + \dfrac{1}{4} = \dfrac{5}{12}\) 

\(\dfrac{y}{3} + \dfrac{1}{4} = \dfrac{5}{12}\)  

\(\dfrac{y}{3}= \dfrac{5}{12}- \dfrac{1}{4}\)     \(Subtract \ 1/4 \ from \ both \ sides\)
 
\(\dfrac{y}{3}= \dfrac{1}{6}\) 

\(y= \dfrac{1}{6}*3\)        \(Multiply \ both \ sides \ by \ 3\)

\(y= \dfrac{3}{6}\) 

\(= y = \dfrac{1}{2}\)         \(Simplify\)