设一等奖X个,二等奖Y个X+Y=60300X+100Y=10000 解出来是:X=20,Y=40
设一等奖为x 二等奖为y300x+100y=10000x+y=60x=60-y300x+100(60-x)=10000300x+6000-100x=10000200x=10000-6000x=20y=60-20