The correct option is A 0
Given, πx+y=9
a) Put x=0, we have
π(0)+y=9⇒y=9
b) Put y=0, we have
πx+0=9⇒πx=9⇒x=9π
c) Put x=1, we have
πx+y=9⇒π(1)+y=9⇒y=9−π
d) Put x=2, we have
πx+y=9⇒π(2)+y=9⇒y=9−2π
Hence, the four solutions of the given equations are: (0,9),(9π,0),(1,9−π),(2,9−2π).