33333

A math quiz for elementary school students

   a5 a4 a3 a2 a1
   -  b4 b3 b2 b1
 -----------------
   3  3  3  3   3

 where
  b1 = 3
  a1~a5,b2~b4 in [1,2,4,5,6,7,8,9] can not be duplicated

found solution:

@@ 41286  7953 @@