解:36÷3/5×25%+25=40甲=(312+18)÷(1+1/2)=220乙=220÷2-18=92
设甲:x,则5x/3=36, x=3*36/5乙数是:0.25x+25甲21.6乙30.4第二道:x/2-(312-x)=18甲220乙92