2/3-3k=5x-5k+1
-5x=-5k+3k+1-2/3
-5x=-2k+1/3
x=2/5k-1/15
解为非负数,则2/5k-1/15≥0,解得2/5k≥1/15,k≥1/6
(2) K取何值时等式：-24-3a的绝对值+（3a-K/2-b）的二次方 =0 中,B是负数?
|-24-3a|+(3a-k/2-b)²=0
a=-8,
3a-k/2-b=0
-24-k/2-b=0
b=-24-k/2
b是负数,即b