NCERT Example 6 - Pair of Linear Equations in Two Variables
Question: In a shop the cost of 2 pencils and 3 erasers is ₹ 9 and the cost of 4 pencils and 6 erasers is ₹ 18. Find the cost of each pencil and each eraser.
Answer: The system has infinitely many solutions. No unique cost can be determined.
Full step-by-step NCERT solution with diagrams on Something by Zero.