设甲仓库存粮12x吨,乙仓库存粮11x吨,由题意可得:
(11x+24)*(1-1/9)=12x
(11x+24)*8=9*12x
88x+24*8=108x
20x=24*8
x=9.6
则乙仓库原来的质量为11x=105.6吨