NCERT Exercise 3.3 - Q2(v) - Pair of Linear Equations in Two Variables
Question: Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method: (v) A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Saritha paid ₹ 27 for a book kept for seven days, while Susy paid ₹ 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.
Answer: The fixed charge is Rs 15 and daily charge is Rs 3.
Full step-by-step NCERT solution with diagrams on Something by Zero.