甲乙两袋球共有90个,甲袋的3/5和乙袋的3/4一样多,两袋球原来各有多少个?

1个回答

  • 设甲袋原来有y个球;乙袋原来有(90-y)个球;

    3/5y=3/4(90-y)

    3/5y=3/4×90-3/4y

    3/5y+3/4y=67.5

    0.6y+0.75y=67.5

    1.35y=67.5

    y=67.5÷1.35

    y=50

    乙袋原来有90-50=40(个);

    答:甲袋原来有50个;乙袋原来有40个;