Question

What to numbers can be added up the six multiplied to nine

Answer 1

6+6+6+6+6+6+6+6+6 or
9+9+9+9+9+9 or
50+4

Answer 2

3 and 3 can be added together to equal 6, and multiplied together to equal 9.

I am sorry but I don't have a good explanation for how to find this number other than testing different factors of 9.