A/5+B/11=(11A+5B)/55=37/55
11A+5B=37
B=(37-11A)/5=7-2A+(2-A)/5是整数
则(2-A)/5是整数
且B是正整数
则(37-11A)/5>=0
1<=A<=3
所以A=2
B=(37-11A)/5=3
A+B=5
5分之A+11分之B
=55分之(11A+5B)
=55分之37
11A+5B=37
A=2 B=3
A+B=5
A/5+B/11=37/55
11A/55+5B/55=37/55
11A+5B=37
5B的尾数为5,两者之和尾数为7,因此11A尾数为2,A为2
A=2,则B=3
A+B=5
A/5=11A/55
B/11=5B/55
所以5B+11A=37
所以A=2,B=3