a certain number of articles are purchased for Rs.1200. if the price per article is increased by 5. then 20 less articles can be purchased. what is the original number of articles
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let the original list price for one book be be x.
If the list price is reduced by 5 then , the new list price is x-5.
A person can buy 5 more books for Rs.300 ,means
(x-5)+5(x-5)=300
x-5+5x-25=300
6x-30=300
6x=330
x=55
The original list price is Rs.55.
Reduced by 5= 50
50+5(50) gives me 300
so, the answer is 50
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