If you would like to know the values of these numbers, you can calculate this using the following steps:
a + b = 1855 a - b = 259 ... a = 259 + b _______________________ a + b = 1855 (259 + b) + b = 1855 259 + 2 * b = 1855 2 * b = 1855 - 259 2 * b = 1596 /2 b = 1596 / 2 b = 798
