Question

Which ordered pair is a solution for 4x - 3y = 6?

Answer 1

4*3 is 12 and 3*2 is 6   12-6 is 6 so the ordered pair is (3,2)

Answer 2

"Which ... " undoubtedly means "Here are some choices.   Pick
the correct one.".  Sadly, you decided not to tell us the choices.

There are an infinite number of them.
Here are a few:

(3, 2)
(6, 6)
(9, 10)
(12, 14)
(15, 18)
(18, 22)
(21, 26)
(333, 442)