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(x + 6)/2 - x = 3

-.5x + 3 = 3

x = 0

In other words: "Pick a number any number"? Nope. "Pick a number any number as long as it's zero"? Yes. Sorry dude you said it wrong its: 1.Pick any number 1-10(example, it can be any whole number) 2.Then double it (x times 2) 3. Then add 6(or any number as long as it is an even number) 4. Then divide by 2 5. Finaly subtract the number you started with 6 And the answer is 3(or half of whatever number you pick for step 3)

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