write and row reduce the augmented matrix to find the general solution:

Question

x - 2y + 13 = 0
y - 4x = 17

Answer 1

(1 -2 -13)
(-4 1 17)

(4 -8 -52)
(-4 1 17)
add to get
(4 -8 52)
(0 -7 -35)
divide to get 1's on the diagonal

(1 -2 -13)
(0 1 5)

add twice row 2 to row 1 to get

(1 0 -3)
(0 1 5)