For this case we propose the following expression:
x: Variable representing the unit rate of each soda
So:[tex]x = \frac {5.04} {12} \frac {dollar} {soda}\\x = 0.42 \frac {dollar} {soda}[/tex]
Thus, 0.42 dollars is paid for each soda.
Answer:
the unit rate of each soda is [tex]0.42 \frac {dolar} {soda}[/tex]