I currently have 4000 apples and 2500 oranges.  I'll be buying some more fruit, and I want to have an equal 50/50 ratio of apples to oranges.

If I'm going to buy exactly 4500 pieces of fruit on top of what I started with, how many apples should I buy and how many oranges should I buy?

Let's work this out in a step by step way to be sure we have the right answer. Give two different versions of responses. Please separate the responses with 6 asterisk symbols: ******.
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