$\begin{array}{c}y=\frac{3}{2} x+3 \\ x=-4\end{array}$
\(\boxed{-3}\)
Step 1 :Substitute x = -4 into the equation y = \(\frac{3}{2}\)x + 3
Step 2 :y = \(\frac{3}{2}\)(-4) + 3
Step 3 :y = -6 + 3
Step 4 :\(\boxed{-3}\)