Given the expression:
[tex]\text{ }\frac{-12}{y}[/tex]At y = 3, it means that we substitute all the y variables in the expression into 3.
We get,
[tex]\text{ }\frac{-12}{y}[/tex][tex]\text{ = }\frac{-12}{3}[/tex][tex]\text{ = -4}[/tex]Therefore, the answer is -4.