4. Find the rule which gives the cost of given number of books, if a book costs 25. by taking the number of books as x
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Answer:
{number of book }× {the price of one book} = {total cost of the given number of books}
Step-by-step explanation:
=} x × 25 = total cost of given number of books
( let it be "y")
=} x × 25 = y
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