Question

3．甲乙兩倉庫共存糧3000噸，甲倉存糧的65%與乙倉存糧的80%一共是2130噸，原來甲倉存糧多少噸？

Answer 1

分析 設(shè)甲倉存糧x噸，則乙倉存糧3000-x噸，根據(jù)等量關(guān)系：甲倉存糧的噸數(shù)×65%+乙倉存糧的噸數(shù)×80%=2130噸，列方程解答即可．

解答 解：設(shè)甲倉存糧x噸，則乙倉存糧3000-x噸，
65%x+80%×（3000-x）=2130
         65%x+2400-80%x=2130
                           15%x=270
                                  x=1800，
答：原來甲倉存糧1800噸．

點評 本題考查了百分數(shù)的實際應(yīng)用，關(guān)鍵是根據(jù)等量關(guān)系：甲倉存糧的噸數(shù)×65%+乙倉存糧的噸數(shù)×80%=2130噸，列方程．