he got 3*12=<<3*12=36>>36 slices

So each slice cost 72/36=$<<72/36=2>>2

So 5 slices would cost 5*2=$<<5*2=10>>10

# Answer

10
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Kim buys 3 pizzas.  They are 12 slices each.  The pizza cost $72.  How much did 5 slices cost?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
10
Kim buys 3 pizzas.  They are 12 slices each.  The pizza cost $72.  How much did 5 slices cost?
train