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The cost of \(4\) pens and \(4\) pencil boxes is \(Rs.100\). Three times the cost of a pen is \(Rs.15\) more than the cost of a pencil box. Form the pair of linear equations for the above situation. Find the cost of a pen and a pencil box.
Answer:
The cost of a pen is \(Rs.\).
The cost of a pencil box is \(Rs.\).
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