Answer
$9\gt z$
Work Step by Step
$30\gt-(5z+15)+10z$ $\longrightarrow$ multiply (by -1) using the distributive property
$30\gt-5z-15+10z$ $\longrightarrow$ combine like terms
$30\gt5z-15$ $\longrightarrow$ add 15 to both sides
$30+15\gt5z-15+15$
$45\gt5z$ $\longrightarrow$ divide both sides by 5
$45\div5\gt5z\div5$ $\longrightarrow$ simplify
$9\gt z$
Check the inequality.
$30\gt-(5(0)+15)+10(0)$
$30\gt-(0+15)+0$
$30\gt-15\checkmark$
