HELP PLEASE WILL MARK BRAINLIEST PLEASE SHOW WORK 100 POINTS
the cost of admission to a history museum is $3.25 per person over the age of 3: kids 3 and under get in free. If the total cost of admission for the Warrick family, including their 6-month old twins is $19.50, find out how many family members are over 3 years old.