# How do you solve 3x - 36 = -21?

Nov 13, 2015

$x = 5$.

#### Explanation:

$3 x - 36 = - 21$.
To solve for $x$, we have to leave it alone. Step-by-Step:
We first pass the $- 36$ to the other side, adding:
$3 x = - 21 + 36$,
$3 x = 15$.
We now divide by $3$ on the right, as on the left it is multiplying:
$x = \frac{15}{3}$,
$x = 5$. This is the final answer.