What is x when 45 is over x equalling 9?

Answer 1

When what equals 9: the 45/x, the 45, or the x?

In the case of 45/x = 9, 45/x = 9.

In the case of x = 9, 45/x = 5.

In the case of 45 = 9, the case of a false statement is being considered, and therefore 45/x is undefined.