I had to call my son the computer whiz in LA to help me out on this one. They owed him some time in the massively parallel processor complex where he works, so he logged in and ran this one for me last night. Here's what he came up with:
If I drop one of something blindly into a bucket and then I look in the bucket and there are two of them in there, I can logically conclude that the thing that was in there before must have been exactly like the thing I dropped in, and that there used to be one of them where now there are two of them. So the original number was also -5, just like the amount you added.
The final result is 10.4% more than the original number.
31
60.8
120
238
If 22 is the result of decreasing a number by 2 then that number was 24. If 24 is four times the original number, we can get the original number by dividing 24/4 = 6 Th original number was 6.
17
When 180 is decreased by 40% the result is 108.
When 25 is decreased by 20% the result 20.
When 3 times a number is decreased by 4 the result is 17. what is the number?
When 40 is decreased by 30% the result is 28.
The final result is 10.4% more than the original number.
31
Let the number be x and so if x-20 = 32 then x = 52
The number is 26
40
20