✔ 最佳答案
Let x --- number of peaches Monkey B had stolen
y --- number of peaches Monkey A had stolen
x + y =32
Let's solve it step by step:
At first ...
1. Monkey B: x ; Monkey A: y
Then Monkey B robbed half the peaches Monkey A had ...
2. Monkey B: x + y/2 ; Monkey A: y/2
After that, Monkey A robbed half the peaches Monkey B had ...
3. Monkey B: (x + y/2)/2 = (2x + y)/4;
Monkey A:y/2 + (x + y/2)/2 = (2x + 3y)/4
Finally, Monkey B get 2 more than Monkey A after Monkey A had given B 6 peaches.
Hence, (2x + y)/4 + 6 - [(2x + 3y)/4 - 6] = 2
-2y/4 = 2 - 12
-2y=-40
y = 20
i.e. Monkey A had stolen 20 peaches at first.