A child purchases a number of notebook for rs 80. If he had purchased 4 more notebooks for the same amount from the other bookseller , then a notebook would have cost rs 1 less. Represent the above situation in the form of quadratic equations .
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80X=[X+4]79
80X=316+79X
80-79]X=316
X=316
80X=316+79X
80-79]X=316
X=316
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