variable to represent one quantity and second a theater sold 220 more adult tickets than childrens tickets

Your question is incomplete

12d^2+34d+20=0 solve equation

To represent one quantity, let's use the variable "x".

To represent the number of adult tickets sold in the theater, we can use the variable "a".

To represent the number of children's tickets sold, we can use the variable "c".

According to the given information, the theater sold 220 more adult tickets than children's tickets. This can be written as:

a = c + 220

Here, "a" represents the number of adult tickets, "c" represents the number of children's tickets, and 220 represents the difference in the number of adult tickets and children's tickets sold.