跪求数学题算式!详细.题目英文 - -
问题描述：
跪求数学题算式!详细.题目英文 - -
Mr Chan deposits $x in a bank . If the interest rate is decreased from 4% to 3.25% each year ,the simple interest obtained after 15 months will be decreased by $22.5 . Find the value of x .
答
(4%-3.25%)x=22.5
x=3000