Hi all,

I have the following set of equations:

(13a + 4b)mod729 = 19

(13c + 4d)mod729 = 15

(4a + 3b)mod729 = 5

(4c + 3d)mod729 = 3

(11a + 4b)mod729 = 5

(11c + 4d)mod729 = 7

I feel a lot more comfortable solving this if i had 2 unknowns. With 4 unknowns do i need to create a matrix or anything to solve them?

Thanks!