5 books nd 7 pens together cost rs.79 whereas 7books nh 5 pens cost rs.77 .repersent this situtions in the form of linear equation in two variables...
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let the book be 'x'
let the pen be 'y'
5x+7y= 79
7y=79-5x
7x+5y=77
5y=77-7x
let the pen be 'y'
5x+7y= 79
7y=79-5x
7x+5y=77
5y=77-7x
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I Think it is correct
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