Answer:
[tex]\large\boxed{m<\dfrac{71}{7}\to\left\{m\ |\ m<\dfrac{71}{7}\right\}\to m\in\left(-\infty,\ \dfrac{71}{7}\right)}[/tex]
Step-by-step explanation:
[tex]170-7m>99\qquad\text{subtract 170 from both sides}\\\\-7m>-71\qquad\text{change the signs}\\\\7m<71\qquad\text{divide both sides by 71}\\\\m<\dfrac{71}{7}[/tex]
