Question

Two systems of equations are shown. The first equation in system B is the original equation in system A. The second equation in system B is the sum of that equation and a multiple of the second equation in system A.



What is the solution to both systems A and B?

(3, 4)
(3, 5)
(4, 3)
(5, 3)

Answer 1

(3, 4)

Check: x - 2y = 3 - 8 = -5 and -2x + 4y = -6 + 16 = 10, so (3,4) satisfies the equations (and the row operation that produced system B preserves solutions).