Let's use variables:
* G: Number of guppies
* Z: Number of zebrafish
* F: Number of goldfish
Set up equations based on the information given:
* "She has 3 more than twice as many zebrafish as goldfish"
* This translates to: Z = 2F + 3
* "She has 23 fish in total"
* This translates to: G + Z + F = 23
Now we have a system of two equations:
1. Z = 2F + 3
2. G + Z + F = 23
Solving for the variables:
1. Substitute the value of Z from equation 1 into equation 2:
* G + (2F + 3) + F = 23
2. Simplify the equation:
* G + 3F + 3 = 23
* G + 3F = 20
3. We need another equation to solve for all three variables. We don't have enough information to determine the exact number of each type of fish.
Conclusion:
We can't find the exact number of guppies, zebrafish, and goldfish with the information provided. There are multiple possible combinations that would satisfy the given conditions.