答:原来混合时,取甲种矿石44吨,乙种22吨.
设第一次取甲矿X吨,乙矿Y吨.
54% X + 36% Y =48% (X+Y)
54% (X-12) + 36% (Y+10) =45% (X+Y-2)
化简得:
X-2Y=0
X-Y=22
解方程组得:
X=44
Y=22
答:.
答:原来混合时,取甲种矿石44吨,乙种22吨.
设第一次取甲矿X吨,乙矿Y吨.
54% X + 36% Y =48% (X+Y)
54% (X-12) + 36% (Y+10) =45% (X+Y-2)
化简得:
X-2Y=0
X-Y=22
解方程组得:
X=44
Y=22
答:.