3x+2y=k+1 (1)
4x+3y=k-1 (2(
(1)×7-(2)×5
21x+14y-20x-15y=7k+7-5k+5
x-y=2k+12
x>y则x-y>0
所以2k+12>0
k>-6
所以k=-5,k--4,k=-3,k=-2,k=-1