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题目
alan and scott own a sum of money.alan owns 90%.if he gives $16 to scott,he will own 85% of the money.how much money do they own

提问时间:2020-10-15

答案
set x as the money they have
then alan owns 90%x
90%x-85%x=16
5%x=16
x=320
then own $320
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