Question

Which ordered pair is a solution to the system of equations?

{2x−y=−1
{2x−4y=8

Answers:
(8, 2)
(7, -5)
(1, 3)
(-2, -3)

Answer 1

the third one is the correct answer
instead of going through the long process of the simultaneous equation just input the first number for the x into the equation and 2nd for y and you get your answer