28 x + 10 = 19 y + 2 = 15 z + 4.

To solve the equations 28 x + 10 = 19 y + 2, or y = x + (9 x + 8) / 19, let

m = (9 x + 8) / 19, we have then x = 2 m + (m - 8) / 9.