柜台上摆放着三种规格的钢笔，A种比B种贵2/3，B种比C种便宜25%，已知A种比C种贵5元，求C种的价格?不要方程
柜台上摆放着三种规格的钢笔，A种比B种贵2/3，B种比C种便宜25%，已知A种比C种贵5元，求C种的价格?不要方程
日期：2021-05-05 02:05:42 人气：1
C的价格
=5/[(1-25%)*(1+2/3)-1]
=5/(3/4*5/3-1)
=5/(5/4-1)
=5/(1/4)
=20
=5/[(1-25%)*(1+2/3)-1]
=5/(3/4*5/3-1)
=5/(5/4-1)
=5/(1/4)
=20