Answer
$a=-2$
Work Step by Step
We need to get the a alone. In order to cancel out division, we use multiplication, so we multiply both sides by 2 to get that $a+10=8$. We now cancel out the addition by subtracting 10 on both sides, giving us a final answer of $a=-2$. We plug -2 in for a and confirm that our answer is, indeed, correct.
