If $y = 1$ and $2x + 3y = 4$, express the value of $x$ as a common fraction.
Substituting $y = 1$ into $2x+3y=4$ gives  \begin{align*}
2x+3(1) &= 4\\
\Rightarrow 2x &=1\\
\Rightarrow x &= \boxed{\frac12}.
\end{align*}