.

Now list all the pairs of numbers that can multiply to 480:

The pairs with one odd number and one even number will result in y not being an integer, so you can throw those out. Also, the pairs such that the sum of the numbers is not divisible by 4 will result in x not being an integer, so you can throw those out.

1.

is a solution.

2.

is a solution.

3.

is a solution.

4.

is a solution.

Hence the solutions are .