The aquarium has 10 more red fish than blue fish. 60 percent of the fish are red. how many blue fish are in the aquarium? show your work.

20

Step-by-step explanation:

Let be the number of red fish and the number of blue fish.

Set up the following system of equations:

You can substitute the first equation into the second equation:

And finally, you must solve for "x":

Blue fish = 20

Step-by-step explanation:

Let x be the number of blue fish in the aquarium.

The aquarium has 10 more red fish than blue fish.

Number of red fish = x+10

Total number of fished = x + (x+10) = 2x+10

It is given that 60 percent of the fish are red. It means number of red fishes is equal to 60% of total fishes.

Isolated variable terms of left side.

Divide both sides by -0.2.

Therefore, the number of blue fishes is 20.