Question

The aquarium has 198 guppies, angelfish and catfish altogether.

There are 4 times as many guppies as angelfish. There are 6 more
angelfish than catfish.
How many catfish are there?​

Answer 1

Number of catfish = 28

Explanation:

Let the number of catfish = c

Number of angle fish = c + 6

Number of guppies = 4*(c + 6) = 4c + 4*6 = 4c + 24

Total fishes = 198

c + c + 6 + 4c + 24 = 198 {Combine like terms}

c + c +4c + 6 + 24 = 198

6c + 30 = 198 {Subtract 30 from both sides}

6c = 198 - 30

6c = 168

c = 168/6 {Divide both sides by 6}

c = 28