Needs help with both

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

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?