4x-3(x-3)=5x+3(k+6)
4x-3x+9=5x+3k+18
4x=-9-3k
x=-(3k+9)/4
1.为负数
x-3
2.小于-(1\2)
-(3k+9)/41/2
3k+9>2
3k>-7
k>-7/3
3.不大于k的相反数
-(3k+9)/4≤-k
3k+9≥4k
k≤9