Question

5 books and 7pens 2gether coat ₹79,wheares 7 books nd 5 pens 2gether cost ₹77.represent this situation in the form of linear eqeqin 2 variablesn

Answer 1

let books be x qnd pens be y
according to 1st condition
5x+7y=79
according to 2nd condition
7x+5y=77

Answer 2

5x+7y=79--------(1)
7x+5y=77--------(2)
multiply 1 with 7
35x+49y=553---------(4)
multiply 5 with 2
35x+25y=385---------(5)

by eliminating 5 and 4
35x+49y=553
35x+25y=385



you will get the answer