Question

The set of values of c so that the equations y=x+c and x+y-8x-9=0 have no solution

Answer 1

y=x+c

x+y-8x-9=0

y-7x=9

x+c-8x=9

c-7x=9

c=9+7x

Answer 2

Answer:

x+c=y.........(1)

x+y-8x-9=0

-7x+y-9=0

-7x+x+c=9

-6x+c=9

c=9+6x