鹅重7.8千克，比鸡的3倍还多0.3千克。鸡重多少千克？;n/C0c8j3\1m(K:q;p
算式：提示6w;p/E-c*Y5L3e0x-j(l7H;n/C0c8j3\1m(K:q;p
答：鸡重.p0e,g-l/V7B;Q,w7u6f-r8x1L千克;n/C0c8j3\1m(K:q;p