One half of the birds at the pet store are yellow. Tara buys one of the yellow birds. Then, one third of the birds at the store are yellow.

How many yellow birds were at the pet store before Tara bought one?

Explain your reasoning.

x − a ll bi r d s 2 1 ​ x − t h e ye ll o w bi r d s 2 1 ​ x − 1 = 3 1 ​ x / ⋅ 6 3 x − 6 = 2 x x = 6 ⇒ 2 1 ​ x = 2 1 ​ ⋅ 6 = 3 A n s . 3 ye ll o w bi r d s

Answered by kate200468 | 2024-06-10

Well, y=ny 2(y-1)=ny (where ny is not-yellow) You get y=2y-2 or y=2. You had two yellow birds and two other types.

Answered by Anonymous | 2024-06-10

Initially, there were 6 birds at the pet store, with 3 of them yellow. After Tara bought one yellow bird, 2 yellow birds remained, which was one third of the total birds left. Therefore, there were 3 yellow birds at the store before Tara's purchase.
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Answered by kate200468 | 2024-12-23