Hi there!
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I believe your answer is:
[tex]m = 14[/tex]
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Here’s why:
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[tex]\boxed{\text{Solving for 'm'...}}}\\\\(\frac{3}{7}) m=6\\\\-------------\\\rightarrow (\frac{3}{7}m)7 = 6*7\\\\\rightarrow 3m = 42\\\\\rightarrow \frac{3m=42}{3}\\\\\rightarrow \boxed{m= 14}[/tex]
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Hope this helps you. I apologize if it’s incorrect.