JEE Advanced Maths: Linear Equations in Two Variables questions with solutions

Q1. Solve the system of linear equations: x + 2y = 7 3x + 5y = 18

1. x = 1, y = 3
2. x = 3, y = 1
3. x = 2, y = 2.5
4. x = -1, y = 4

Answer: x = 1, y = 3

Solving two linear equations in two unknowns by elimination/substitution gives a unique solution.