Answer:
3k+5a=45
Step-by-step explanation:
It says write an equation. It doesn't specify that you have to solve. That means you can use variables like (k) and (a).
That allows for more flexibility and the equation 3k+5a=45.
3k means that 3 dollars per ticket times (k) tickets equals the total price for kid's tickets
5a means that 5 dollars per ticket times (a) tickets equals the total price for adult's tickets