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The local zoo nurses 15 species of cats. Last week, several species were moved to other zoos due to a lack of funding. The zoo now nurses only 7 species.

Let \( x \) represent the number of species moved.

Which equation models the scenario?

A. \( x + 7 = 15 \)

B. \( x - 7 = 15 \)

C. \( 15 + x = 7 \)

D. \( 15 - x = 7 \)

Answer :

The equation 15 - x = 7 models the scenario because it represents the decrease in the number of cats that the zoo now nurses. It can be read as "15 (the number of cats originally) minus x (the number of cats moved) equals 7 (the number of cats the zoo now nurses)".

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