Question

goldfish cost $2 and tropical fish $2.50. Howard bought three more goldfish than tropical and spent $15. How many goldfish did he buy?

Answer 1

Step-by-step explanation: b represents tropical fish. He bought 3 more goldfish than tropical, so whatever number of b he bought, he added 3 to that when buying goldfish. 3+b is the number of goldfish he bought.

=> 2(3+b) + 2.50b = 15

6+2b+2.50b = 15

2b+2.50b = 15-6

4.5b=9

4.5b/4.5=9/4.5

=> b = 2

Remember, 3+b is the number of goldfish he bought, so 3+2 = 5

Therefore, Howard bought 5 goldfish and 2 tropical fish.

Answer 2

Howard bought 5 Goldfish and 2 Tropical Fish.

Step-by-step

B represents Tropical Fish. He bought 3 more Goldfish than Tropical, so whatever number of B he bought, he added 3 to that when buying Goldfish.

So, 3 + B is the number of Goldfish he bought.

2 (3 + B) + 2.50B = 15

6 + 2B + 2.50B = 15

2B + 2.50B = 15 - 6

4.5B = 9

4.5B/4.5 = 9/4.5

So, B = 2

Remember, 3 + B is the number of Goldfish he bought, so 3 + 2 = 5

That being the case, Howard bought 5 Goldfish and 2 Tropical Fish.