Lost. Sorry.
.
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 .