A adult's ticket costs twice as much as a child's ticket. The cost of Mr and Mrs Brown and their five children is $3.15. Write a equation for this information and solve it

Cost of Childrens ticket = 35¢

Cost of Adults Ticket = 70¢

Step-by-step explanation:

1 Adult ticket = 2 child tickets

2 Adult ticket = 4 child tickets

Plus there are 5 children = 5 child tickets

So, total child tickets = 9

$3.15 / 9 = 0.35

5 * 0.35 + 2 * 0.7 = $3.15