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Anna has a total of 36 goldfish in her aquarium, some are orange and some are black. The number of orange goldfish is 7 more than twice the number of black goldfish. Which system of equations below can be used to describe the number of black and orange goldfish in Anna's aquarium?(Let x represent the number of orange goldfish and y represent the number of black goldfish.)A. x + y = 36x - 2y = 7B. x - y = 7x + 2y = 36C. x - y = 36x + 2y = 7D. x + y = 7x - 2y = 36

Answer :

total goldfish = 36

orange goldfish= x = 7 more than twice the number of black goldfish

x = 2y + 7

Black goldfish = y

x + y = 36

x = 2y + 7

x-2y = 7

A.

x + y = 36

x - 2y = 7

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