Question

If the two lines x+y=5 , kx+2y=0 are parallel then k=

Answer 1

1/1=2/k
=1*2 =1*k
k=2

hope this help

Answer 2

`(1)/(1) = (2)/(k) \\ \\ \Longrightarrow~~ k = (2* 1)/(1) = \boxed{2}`