...为了表彰优秀,班主任王老师用W元钱购买奖品.若以2支钢笔和3本笔记本...答:1,(2x+3y)*60=(2x+6y)*4012x-8x=24y-18yx=3y/22,(2x+3y)*60=Wx=3y/2,即2x=3y代入上式:(3y+3y)*60=WW/y=360(本)3,两种奖品都要有:a>0,b>0,均为正整数;(ax+by)*30=Wx=3y/2代入上式:45ay+30by=W45a+30b=W/y=3601.5a+b=12b=12-1.5a,a=2,b=9;a=4,b=6;...