1、(1) x₁=1,x₂=0
(2) x₁=-2/3,x₂=4/3
(3) x₁=-2/3,x₂=2/3
(4) x₁=1,x₂=-5
(5) x₁=1,x₂=5/3
(6) x₁=1,x₂=-1/2
(7) x₁=1,x₂=-5/2
(8) x₁=-3/2,x₂=3/2
(9) x₁=-2,x₂=-5/2
(10) x₁= x₂=1
2、(1)y₁=-3,y₂=-1
(3)y₁=1,y₂=-2
(4)x₁=1,x₂=-2/3
(6)x₁=20,x₂=-8
(8)y₁=1,y₂=-2
3、-3:5或2:1
5、4
6、B
7、略
8、2s