Ihave a bag of oranges. the first day, i ate one-third of them. the next day i ate half of the remaining oranges. the next day i opened the bag to find that i only had 2 left. how many were in the bag when i bought it?

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.