a math jj question

bien0812

11個大紙箱，裡面不是empty就是裝了6個中的紙箱; 中紙箱裡不是empty就是裝了6個小的紙箱的那一題。

Somebody knows the exact question and answear to it?

smileinwind

98(同本月JJ15题）DS:Tom is going to move, he has three kinds of boxes: large, medium, and small. Now he has already 11 large boxes, each of which is either empty or filled with 6 medium boxes. Medium boxes are filled in the large boxes and each of them is either empty or filled with 6 small boxes. Small boxes are empty and filled in the medium boxes. How many boxes does Tom have?(1) he has 56 empty boxes(2)he has 42 small boxes.

a

设11大里有a个含中
        则共有6a个中,11-a个大空

设6a中里有b个含小
        则共有6b个小,(即6b个小空),6a-b个中空

6b+6a-b+11-a=56

a+b=9

要求的是11+6a+6b

A