Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
dunno what were the conditions, but suppose anbody can pay $10/visit, but members pay only $5/visit after a $25 signup fee. Then,
C(non) = 10n
C(member) = 25+5n
solve for n to find when the cost is the same.