Answer
$m\lt-2$ or $m\gt3$
Work Step by Step
Treat $5m\lt-10$ and $3m\gt9$ as separate inequalities and solve them separately.
divide the 5 in $5m\lt-10$ to isolate the $m$
$m\lt-2$
Divide the 3 in $3m\gt9$ to isolate the $m$
$m\gt3$
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