Question

solve for a.
5 + 2a = a - 9
a = ?

Explanation:

Step1: Move terms with a to one - side

Subtract a from both sides:
$5 + 2a - a=a - 9 - a$
$5 + a=-9$

Step2: Solve for a

Subtract 5 from both sides:
$5 + a-5=-9 - 5$
$a=-14$

Answer:

$-14$