设乙仓库存粮x吨,那么甲仓库存粮(x-5)吨,则:
2*(x-5)(1-2/3)=(1-40%)x
2/3*(x-5)=0.6x
2x-10=1.8x
x=50
即乙仓库存粮50吨,那么甲仓库存粮(x-5)=50-5=45吨 .