Problem- Suppose I titrated a solution of 3 ml 6 M HCl and 3 ml water with 16.3 ml of 1 M NaOH until endpoint was reached. How do I calculate mol HCl eq?

Then I prepared another solution of 3 ml HCl, 1.2 ml AcOH and 1.8 ml EtOH and titrated it with 29.65 ml of 1 M NaOH. According to the professor I can get the mol HCL eq + mol AcOH eq out of this but how?

How do I yet start setting this up? Thank you