30% of the tickets sold by a movie theater for the Friday night show were children's tickets at $4 each. the rest of the tickets were sold at the full price of $8.50.the movie theater collected $360 just for the children's tickets. how many tickets did they sell in all?

Answer 1

360/4 = 90 children's tickets

0.3x = 90
x = 90 / 0.3
x = 300