xiaocan baofei ttúfǎtingan dingjùzhan jhuiduchediqian yitàii shanpingmù biaoxi shengchui yanyijìtuoing yu2x+y=9;y+2=0;y=x+z;0.g((-20)/(10))/(10+1) mingje fangexing wangze1renzhiduyuán zhujùcquánzheng bianyan suanfeijianhud ruiwei guosoujqiu yin...