PLEASE HELP The diagram below shows a food web in a large park. Each circle represents a different species in the food web.

Which of the organisms in the food web could be referred to as primary consumers?
7 only
5 and 6 only
2, 3, and 4 only
2, 5, and 7 only

Explanation:

2 , 3 and 4 only because they the first ones to eat

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

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