设纤扰甲的成搭竖告本为x,乙的知明成本为y,
则列方程为
x=y-100
x(1+0.5)*0.9+y(1+0.4)*0.9-x-y=148
解方程即可x=200,y=300
一定要采纳呀
注意判别正确与否!!别学错了!!!
kancuole
设成本甲x元,乙y元
x = y + 100
0.5x + 0.4y = 148
得x = ;y =
设瞎和甲成本为X元辩散,乙成本为Y元
1) X+100=Y
2) (X*1.5+Y*1.4)*0.9-X-Y=148
2)式整理为 0.35X+0.26Y=148
1)代入上式携神氏 0.35X+0.26(X+100)=148
X=200 Y=300