Question

3x-y=9
9x-3y=9
in cross multiplication method

Answer 1

Answer:

3x-y-9=0

9x-3y-9=0

x/(9-27)=y/(-81+27)=1/(-9+9)

x/(-18)=y/(-54)=1/0=infinite

This shows that values of x and y are very large.

See that a1/a2=b1/b2 =1/3

So two lines are parallel.