Two step equations:

Vincent started the year with $254 in his account at the health spa. Each time he uses the spa, $15 is taken out of the account. How many more times can he use the spa if he has already had $180 taken out of his account this year?

I mostly just need to know how to set this problem up.

Thank you!

I've done a decent job helping my daughter with this stuff, but it's been awhile since I was in school & just can't quite figure it all out.