一种收音机每台售价今年比去年降低百分之二十五.今年售价36元,去年每台售价多少钱?

问题描述:

一种收音机每台售价今年比去年降低百分之二十五.今年售价36元,去年每台售价多少钱?

设去年每台售价为x元
(1-25%)x=36
0.75x=36
x=36/0.75
x=48
去年每台售价为48元
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