Let's let the variable t represent the amount of tickets for the new show that are sold and the variable p represent the amount of small containers of popcorn that are sold. Now, let's set up an equation.
We know that tickets cost $10 and popcorn costs $6, therefore these should be the coefficients in front of their respective variables. The two cost + item terms should equal $3000, because this is the breakeven on the show, or how much money they want to earn.
Thus, the equation is:
10t + 6p = 3000
Hope this helps!