To solve this problem, first create an equation that you can use to find the answer. It would look like this:
510 = 60x + 150
Then, subtract 150 from each side to isolate x.
360 = 60x
Now, divide both sides by 60 to get the number of cars he needs to sell.
6 = x
Since he needs to make MORE than 510 dollars, he has to sell at least 7 or more cars, thus making B the correct answer. Hope this helps and please add a "Thanks!" if it did! :)
