જો $x=0$ હોય, તો  $\pi(x)+y=9$ 

$\therefore \pi (0)+y=9$

$\therefore 0+y=9$

$\therefore y=9$

આમ, $x=0$ હોય, તો $y=9$ $\therefore$ ઉકેલ $(0,\,9)$

જો $x=1$ હોય, તો  $\pi(x)+y=9$ 

$\therefore \pi(1)+y=9$

$\therefore \pi+y=9$

આમ, $x=1$ હોય, તો $y=9-\pi$ $\therefore$ ઉકેલ $(1,\,9-\pi)$

જો $x=2$ હોય, તો  $\pi (x)+y=9$

$\therefore \pi(2)+y=9$

$\therefore 2 \pi+y=9$

$\therefore y=9-2 \pi$

આમ, $x=2$ હોય, તો $y=9-2 \pi$ $\therefore$ ઉકેલ $(2,\,9-2 \pi)$

જો $x=3$ હોય, તો  $\pi(x)+y=9$ 

$\therefore 3 \pi+y=9$

$\therefore y=-3 \pi+9$

આમ, $x=3$ હોય, તો $y=-3 \pi+9$ $\therefore$ ઉકેલ $(-1,\,-3 \pi+9)$