The given equation relates the positive variables $a$, $b$, $k$, and …

The given equation relates the positive variables

a

b

k

, and

m

. Which equation correctly expresses

m

in terms of

a

b

, and

k

m = \frac{10 ( ak - 9 )}{b}

m = ak - 9 - \frac{b}{10}

m = ak - \frac{9 b}{10}

m = \frac{10 ak}{b} - 9

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