鸡兔共有110只脚，若鸡数和兔数互换，则有脚100只，鸡和兔各有多少只？/v(P0x:w
算式：提示:D5|4b4`'p0u'n/v(P0x:w
答：鸡有-s.F+M6E7t2i只，兔有9T0q,f;e2D+D'G,J.z只。/v(P0x:w