轮子关了鸡和狗共96支腿鸡和狗各多少只
如雞是X支, 狗是Y支, 用腳來算2X + 4Y = 96
X + 2Y = 48
因此, 又很多可組成的答案
X = 48 Y = 0 X = 36 Y = 6 X = 24 Y = 12 X = 12 Y = 18
X = 46 Y = 1 X = 34 Y = 7 X = 22 Y = 13 X = 10 Y = 19
X = 44 Y = 2 X = 32 Y = 8 X = 20 Y = 14 X = 8 Y = 20
X = 42 Y = 3 X = 30 Y = 9 X = 18 Y = 15 X = 6 Y = 21
X = 40 Y = 4 X = 28 Y = 10 X = 16 Y = 16 X = 4 Y = 22
X = 38 Y = 5 X = 26 Y = 11 X = 14 Y = 17 X = 2 Y = 23
X = 0 Y = 24
同时关的话,只要鸡的数目是偶数都成立,如(狗23×4)+鸡2×2)等等,分别关的话就只有一个答案。
你还没说几个头呢??
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