Which equation could be used to find how many soft drink refills Ryan ordered

Solution
We are given
Restaurant charge = $16.99
Soft drink refill charge each = $1.75
Ryan paid = C
Let x denotes the number of soft drink refill Ryan ordered, so we have
[tex]16.99+1.75x=C[/tex]Therefore, the answer is
[tex]1.75x+16.99=C[/tex]