1设最初明明脊首码判有X元,天天有Y元,可樱模数列式0.5X+(Y+0.5X)×1/3-0.5X+(Y+0.5X)×1/3×1/4=675(Y+0.5X)×2/3+0.5X+(Y+0.5X)×1/3×1/4=1325X=700Y=1300
1.设小明开始有x元,天天有塌皮扰团旦Y元握睁,整理得x+0.5y=1350, x+1.5y=2650 ,得x=700,y=1300