{6x-5y=11 (1)
-4x-4y=7 (2)
(1)×4得 24x-20y=44 (3)
(2)×5得 -20x-20y=35 (4)
(3)-(4)得 44x=9
x=9/44
x=9/44代入(2)得
-9/11-4y=7
y=-43/22
∴{x=9/44,y=-43/22是原方程组的解
{6x-5y=11 (1)
-4x-4y=7 (2)
(1)×4得 24x-20y=44 (3)
(2)×5得 -20x-20y=35 (4)
(3)-(4)得 44x=9
x=9/44
x=9/44代入(2)得
-9/11-4y=7
y=-43/22
∴{x=9/44,y=-43/22是原方程组的解