Algebra Examples

$x + y = 23$

Step 1

Subtract $x$ from both sides of the equation.

$y = 23 - x$

Step 2

To rewrite as a function of $x$ , write the equation so that $y$ is by itself on one side of the equal sign and an expression involving only $x$ is on the other side.

$f (x) = 23 - x$