Solve the equations: 4x -y = 11; 5x + 2y = 4.
- A.
x = 6, y = 13 - B.
x = -2, y = -3 - C.
x = -2, y = 3 - D.
x = 2, y = -3 - E.
x = 2, y = 3.
Correct Answer: Option D
Explanation
4x – y = 11….(1) x 2 8x – 2y = 22….(3)
5x + 12y = 4….(2) x 1 5x + 2y = 4….(4)
add eqn (3) and (4)
13x = 26
x = 2
4(2) – y = 11 (implies) y = 8 – 11
y = -3.