Answer:
[tex]m=18[/tex]
Step-by-step explanation:
The equation given is [tex]D=\frac{m}{v}[/tex]
and also we have that [tex]D=\frac{6}{7}[/tex], thus:
[tex]\frac{6}{7}=\frac{m}{v}[/tex]
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I think the question is missing which variable is defined as [tex]=m+3[/tex], so I will solve for [tex]v=m+3[/tex] since is the only other variable in the equation.
substituting [tex]v=m+3[/tex] into [tex]\frac{6}{7}=\frac{m}{v}[/tex]:
[tex]\frac{6}{7}=\frac{m}{m+3}[/tex]
and we solve for m:
[tex](m+3)(6)=7m\\6m+18=7m\\18=7m-6m\\18=m[/tex]
m is equal to 18.
