A company that sold fish for an aquarium had a special one weekend on tetras and angel fish. The store sold a total of 110 of those types of fish over the weekend. The tetras each sold for $0.40 and the angel fish each sold for $1.20. If they made a total of $80 in selling those fish, how many tetras did they sell?

They sold 65 tetras.

Step-by-step explanation:

Let x= Number of tetras

y= Number of angel fish.

As per given,

x+y= 110                  (i)

0.40x+1.20y=80         (ii)

Multiply 2.5 on both sides of (ii), we get

x+3y=200        (iii)

Eliminate (i) from (iii)

Put value of y in (i)

Hence, they sold 65 tetras.

-2?

Step-by-step explanation: