I need help with this cause I don’t know what I completely know what I’m doing

Find x & pleeeeaaaassseeee me !

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

The sum of the reciprocal of a positive number and the reciprocal of 2 more than the number is 3/4 equation: the number is