Question

Find all values of k that result in the following system only having one answer:

2x+y=7
y-kx=3
(no explanation needed)

Answer 1

Explanation:

( 2x + y) - ( y + kx) = 7+3

2x + kx = 10

Taking x as common

2 + k = 10

K = 10 / 2 =5