The ratio of the number of people who own a smart phone to the number of people who own a flip phone is 4 to 3. if 500 more people on a smart phone then i flip phone how many people on each type of phone

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?