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Answer:
$420
Step-by-step explanation:
number of people = 5 (4 friends + serena)
number of cars = 2
cost of parking = 7 for each car = 7 * number of cars = 7 * 2 = 14
let t be the cost of each ticket
cost of tickets = t for each person = t * 5
total cost = cost of parking + cost of tickets
= 14 + t * 5
= 2114
2114 = 14 + 5t
subtract 14 from both sides to isolate the variable and its coefficient
2100 = 5t
divide both sides by 5 to isolate t
t = 2100/5 = 420