The two warehouses have a total of 95 tons of grain stored. After taking out (2/3) from warehouse A and taking out (3/5) from warehouse B, the surplus grain in warehouse B is twice the surplus grain in warehouse A. Find the number of tons of grain left in warehouse A.
两个仓库共有存粮95吨，从甲库取出(2/3)，乙库取出(3/5)以后，乙库余粮是甲库余粮的2倍，求甲库所余存粮几吨．
<result>15</result>