Write four solutions for each of the following equations.

$\mathrm{\pi }x+y=9$

Write four solutions for each of the following equations.

$x=4y$

Check which of the following are solutions of the equation $x-2y=4$ and which are not.

$\left(0,2\right)$

Check which of the following are solutions of the equation $x-2y=4$ and which are not.

$\left(2,0\right)$

Check which of the following are solutions of the equation $x-2y=4$ and which are not.

$\left(4,0\right)$

Check which of the following are solutions of the equation $x-2y=4$ and which are not.

$\left(\sqrt{2},4\sqrt{2}\right)$

Check which of the following are solutions of the equation $x-2y=4$ and which are not.

$\left(1,1\right)$