The [number for] each animal needs to be between 1-9 …
Hello. You also know that the numbers must be Whole numbers (from 1 through 9). In your attempts, did you try algebra? Did you guess and check?
There isn't enough information given, to find all three numbers (directly) from solving equations. However, we could use algebra to find formulas for two of the unknowns -- each in terms of the remaining unknown. After that, we would use trial and error, to reason out the solution. Start by picking symbols for the unknown numbers.
Let B = the number of bats
Let C = the number of chickens
Let R = the number of rabbits
Choosing to find formulas in terms of B, for example, might yield something like this (made-up information):
C = 2B
R = B/2
If this were true (and it isn't), then we could see right away that B must be an even number.
From there, we would start guessing and checking -- trying B=2, B=4, B=6, etc. -- until we find Whole numbers for both C and R.
Please show your work, if you've tried anything. Check out the forum's
submission guidelines, too. Cheers ?