Answer:
There are 288 stickers they have altogether.
Explanation:
Solution,
Let equal number of stickers both Logan and Izzy have be x.
After giving 72 stickers to Logan,
Number of stickers Izzy has =

After receiving 72 stickers,
Number of stickers Logan has =

Now according to question,After receiving 72 stickers Logan had 3 times more stickers than Izzy.
Therefore the equation is;

So the number of stickers both Izzy and Logan have is 144.
Total number of stickers they have altogether is the sum stickers each has.
Total number of stickers =

Hence there are 288 stickers they have altogether.