answer this question with full explanation and working
options are actually
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7pencils + 5pens + 2books =39rs
5pencils+3pens+4books=39
3pencils+5pens+7books=56
let cost of pencils is x, cost of Pens is y and cost of books is z
7pencils +5pens+2books=5pencils+3pens+4books
2pencils+2pens+2books=39
1pencils +1pen+1books=39/2
rest of you can do by yourself
answer is cost of each pen is 2rs
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