A yoga studio offers memberships that cost $20 per month for unlimited classes. The studio also accepts walk-ins, charging $5 per class. If someone attends enough classes in a month,
the two options cost the same total amount. How many classes is that?

Astrid spent $36 on new shoes. this was $12 less than twice what she spent on a new skirt. part a: which equation would solve for how much she spent on the skirt? part b: solve the equation in the workspace provided below. how much did astrid spend on her skirt?