Answer
$z=18$
Work Step by Step
$4-10=\frac{z}{-3}$ $\longrightarrow$ simplify
$-6=\frac{z}{-3}$ $\longrightarrow$ multiplication property
$-6\times-3=\frac{z}{-3}\times-3$ $\longrightarrow$ simplify
$18=z$
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