# How do you solve 21>15+2a?

Jul 24, 2018

$a < 3$

#### Explanation:

$21 > 15 + 2 a$

Subtract $\textcolor{b l u e}{15}$ from both sides:
$21 \quad \textcolor{b l u e}{- \quad 15} > 15 + 2 a \quad \textcolor{b l u e}{- \quad 15}$

$6 > 2 a$

Divide both sides by $\textcolor{b l u e}{2}$:
$\frac{6}{\textcolor{b l u e}{2}} > \frac{2 a}{\textcolor{b l u e}{2}}$

$3 > a$

$a < 3$

Hope this helps!