Write an equation in simplest form for:

$y$y is $20$20 times $x$x plus $14$14.

$y$y is $9$9 times $x$x minus $2$2.

$y$y is $x$x divided by $3$3 minus $3$3.

$y$y is $x$x divided by $3$3 plus $12$12.