甲桶农药水7升
乙桶农药水3.5升
丙桶农药水0.5升
设甲桶农药水为X升,丙桶农药水Y升,Z桶农药水Y-3升,得方程组:
X+Y+Y-3=11
Y=7-1/2X
0.4X+0.36(7-1/2X)+0.35(7-1/2X-3)=11*0.385
0.045X=0.315
X=7
甲桶农药水7升
乙桶农药水3.5升
丙桶农药水0.5升
设甲桶农药水为X升,丙桶农药水Y升,Z桶农药水Y-3升,得方程组:
X+Y+Y-3=11
Y=7-1/2X
0.4X+0.36(7-1/2X)+0.35(7-1/2X-3)=11*0.385
0.045X=0.315
X=7