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Math·Advanced Math·Equivalent expressions

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$ak=\frac{b}{12}(7+m)$

The given equation relates the positive variables $a,b,k$, and $m$. Which equation correctly expresses $m$ in terms of $a,b$, and $k$?

A

$m=\frac{12(ak-7)}{b}$

B

$m=ak-7-\frac{b}{12}$

C

$m=ak-\frac{7b}{12}$

D

$m=\frac{12ak}{b}-7$