# How do you solve  12 + 3x = 30?

Jul 28, 2016

$x = 6$

#### Explanation:

$\textcolor{c \mathmr{and} a l}{\text{Subtract 12 on both sides:}}$

$\cancel{12} + 3 x = 30$
$- \cancel{12}$ $\textcolor{w h i t e}{a a} - 12$

12 cancels out on the left side, and when you subtract 12 from 30 on the right you get 18:

$3 x = 18$

$\textcolor{g r e e n}{\text{Divide both sides 3 to get x by itself.}}$

$\frac{\cancel{\text{3}} x}{\cancel{3}} = \frac{18}{3}$

Now you are just left with $x$ on the left side and 6 on the right side.

Thus,
$\textcolor{p u r o k e}{\text{x = 6}}$