How do you solve -2(a+5)=11?

Apr 1, 2018

$a = - \frac{21}{2}$

Explanation:

$- 2 \left(a + 5\right) = 11$

$- 2 a - 10 = 11$

$2 a = - 21$

$a = - \frac{21}{2}$

Apr 1, 2018

$a = - 10.5$

Explanation:

$- 2 \left(a + 5\right) = 11$

You solve this by using the distributive property. That means that you have to multiply the $- 2$ to everything in the parenthesis:

$- 2 a - 10 = 11$

Now we add $10$ to both sides of the equation:
$- 2 a = 21$

Finally we divide both sides by $- 2$ to get the value of $a$.
So $a = - 10.5$

Hope this helps!