2x+4的绝对值+(2x-y+3k)的平方=0
2x+4的绝对值=0,(2x-y+3k)的平方=0
x=-2
2x-y+3k=0
2*(-2)-y+3k=0
-4-y+3k=0
y=3k-4
y>0
3k-4>0
3k>4
k>4/3