A pair of linear equations which has a unique solution x = 2, y = -3 is
A. x + y = -1; 2x – 3y = -5
B. 2x + 5y = -11; 4x + 10y = -22
C. 2x – y = 1; 3x + 2y = 0
D. x – 4y – 14 = 0; 5x – y – 13 = 0
Answer:B
A pair of linear equations which has a unique solution x = 2, y = -3 is
A. x + y = -1; 2x – 3y = -5 B. 2x + 5y = -11; 4x + 10y = -22 C. 2x – y = 1; 3x + 2y = 0 D. x – 4y – 14 = 0; 5x – y – 13 = 0
Explanation: If x = 2, y = -3 is a unique solution of any pair of equations, then these values must satisfy that pair of equations.