30÷B=5,B+A=13,那么请选择ABC7F3B5W7A1\9b1n-j5P(|+W)I7J4T+K9X6h7F/{8K'`*H1Q5s
A. A=9, B=44T+K9X6h7F/{8K'`*H1Q5s
B. A=7, B=64T+K9X6h7F/{8K'`*H1Q5s
C. A=8, B=54T+K9X6h7F/{8K'`*H1Q5s