A library has a fined charge for the first 3 days and an additional charge for each day thereafter Avanshi paid Rs. 27 for a book kept for seven days if fined charges are Rs. x and thereafter charges are Rs. y per day. Write the linear equation representing the above information. 1. 4y + x = 27 2. + %3D 27 3. 3x + y = 27 4. 5x + y = 27 5. Insufficient information