22. Exercise problems XXII

A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Saritha paid \(Rs.27\) for a book kept for seven days, while Susy paid \(Rs.21\) for the book she kept for five days. Find the fixed charge and the charge for each extra day.

 

Fixed charge \(=Rs.\)

 

Charge per day \(=Rs.\)