全不腳-(雞的2腳+兔的2腳)=剩下的兔2腳114-41*2=32->16隻兔
41-16=25雞
設定雞為X,兔子為Y
X+ Y = 41 --- (1)
2X + 4Y = 114 --- (2)
1. (1) x 2 = 2X+ 2Y = 82
2. (2) - (1)
2X + 4Y = 114
2X+ 2Y = 82
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2Y = 32 Y = 16
3. X+ Y = 41
Y = 16
X = 25
雞有25隻,兔子有16隻