Question

Cameron spent $13.50 at a pet store buying fish for his aquarium. He bought a bag of 14 fish that contained a combination of guppies and goldfish. Goldfish cost $1.65 a piece and guppies cost $0.45 a piece. How many of each type of fish did Cameron buy?

Answer 1

x = # of guppies
y = # of goldfish
x + y = 14
1.65 y + 0.45 x = 13.50
Substitute 14-x for y and solve for x.
23.1 - 1.65 x + 0.45 x = 13.50
1.20 x = 9.60
yada yada yada

Answer 2

the answer is 6 goldfish and 8 guppies.