Answer:
There are 15 bees.
Step-by-step explanation:
Let's call x the total number of bees. There is one fifth of that in one bush, which can be written as:
there is one third on another, which is:
the other one has three times the difference between the previous two:
So, if we add those three quantities plus one single bee that flew away, it all should add up to the total number of bees, which is x. So:
We will solve for x:
We will move the positive x on the right of the equal as a negative one to the left:
We can prove this answer by replacing in the original equation: