Answer:
4.875 billion hours
Step-by-step explanation:
-Let X be the total time spent on taxes and 7.8 billion (80%) is time on paper work.
#We equate and cross multiply to get the total time on taxes:

-let y be the 50% amount of time spent. we equate to find it in actual hours:

Hence, 50% of the time is equivalent to 4.875 billion hours
It is 9. You have to add 33y, then divide by 11 and you get x = 3y + 9
The answer is 23 i just answered that one earlier!