7x-3y=-6
则:
35x-15y=-30 ------------------(1)
4x-5y=-13
则:
12x-15y=-39 ------------------(2)
(1)-(2),得:
23x=9
x=9/23
以x=9/23代入7x-3y=-6中,得:
-63/29-3y=-6
y=67/23
则:
x=9/23、y=67/23
7x-3y=-6
则:
35x-15y=-30 ------------------(1)
4x-5y=-13
则:
12x-15y=-39 ------------------(2)
(1)-(2),得:
23x=9
x=9/23
以x=9/23代入7x-3y=-6中,得:
-63/29-3y=-6
y=67/23
则:
x=9/23、y=67/23