a small toy car cost 3$. a large toy car 5 times as much as the small one. zoey wants to buy one of each. what equation can she use to find the cost of two cars

If the small one is 3 dollars and the big one is 5 times as much then all you have to do is multiply 3x5 and you get 15. So the big one is 15 and when you add that to 3 you get 18$. So therefore the answer is $18