原帖由 sss 於 2007-5-12 19:09 發表
如果所有都係正數:
A x A = 100 --> A = 10
A + A + A = 30 = B + B --> B = 15
B + B + C = E --> 30 + C = E (1)
C + D = E (2)
(1) = (2) --> B + B + C = E = C + D
--> 30 + C = ...
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