# A number plus 12 equals forty?

Feb 20, 2018

$28$

#### Explanation:

$x$ is your unknown number, the one that you're trying to find

$x + 12 = 40$

Subtract $12$ from both sides

$x = 28$

Feb 20, 2018

28

#### Explanation:

Let the number required be $x$.

$x + 12 = 40$
$x + 12 - 12 = 40 - 12$
$x = 40 - 12$

$x = 28$