把10本书平均放在2个袋子里，每个袋子要放几本？;A/?:P,]9L4L/Y)}0}:X'w9_4R
算式：提示2x+l;x1E0}:X)I7r.G;A/?:P,]9L4L/Y)}0}:X'w9_4R
答：每个袋子要放/Q7b'Y;N本。;A/?:P,]9L4L/Y)}0}:X'w9_4R