Answer
$z=8$
Work Step by Step
We need to get the z alone. In order to cancel out division, we use multiplication, so we multiply both sides by 9 to get that $z+10=18$. We now cancel out the addition by subtracting 10 on both sides, giving us a final answer of $z=8$. We plug 8 in for z and confirm that our answer is, indeed, correct.
