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設雞X只,兔35-X只 2X+4(35-X)=94 2X+140-4X=94 2X=46 X=23 雞23只,兔12只
設兔X只,雞35-X只 4X+2×(35-X)=94 4X-2X+70=94 2X=24 X=12 雞有:35-X=35-12=23
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