9х + 2у = 18 |*5
3х - 5у = 11 |*2
45х + 10у = 90
+
6х - 10у = 22
____
51х = 112
х = 112/51
х = 2 10/51
х = 2 10/51
3 * 112/51 - 5у = 11
х = 2 10/51
6 10/17 - 5у = 11
х = 2 10/51
-5у = 75/17
х = 2 10/51
у = 75/17 * (-1/5)
х = 2 10/51
у = -15/17
ОТВЕТ: (2 10/51 ; -15/17)