Answer
To proof
As given
Seats cost $16 each, and snacks cost an additional $5 each
The charity needs to raise $307 to consider this event a success.
the number of seats sold = s
the number of snacks sold = y
Than the linear equation be
16 × s + 5 × y = 307
16s + 5y =307
An equation for the amount of money raised for charity is 16s + 5y =$307
Hence proved