if a book store buys 10 books for birr 900 when the price of each book goes up by Birr 3, then the original price (in Birr) of a book is?

The original price of each book in Birr before a Birr 3 increase is Birr 87

Given:

After increase

Number of books = 10

Cost of books = Birr 900

Cost of each book after increase = Cost of books / Number of books

= Birr 900 / 10

= Birr 90

So,

the cost of be each book before a Birr 3 increase = Birr 90 - Birr 3

= Birr 87

Therefore, the original price of each book in Birr before a Birr 3 increase is Birr 87

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87 birr

Step-by-step explanation:

900=10

?= 1

1×900÷10=90

There was increase of 3 for each book

90-3=87

Answer =87

answer: t=3

step-by-step explanation:

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step-by-step explanation: