The system of linear equations x + 2Y = 4K with respect to X and Y is known The solution of 2x + y = 2K + 1 satisfies - 1

The system of linear equations x + 2Y = 4K with respect to X and Y is known The solution of 2x + y = 2K + 1 satisfies - 1

X+2Y=4K (1)
2X+Y=2K+1 (2)
(2) (1) we can get: X-Y = 1-2k
-1