Question

(Ud.) / salir antes de las cinco

Answer 1

The answer with the conjugations would be:

Usted salió antes de las cinco.

You went out before five.

Since (ud.) is singular for formal you you would take away the -ir from the stem and add -ió.

If it was (Uds.) then it would be more that one person and would be:

Ustedes salieron antes de las cinco.

Hope this helps! :3