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Is being able to isolate the variable x from the equation 2^x = 1024 not good enough for you? You need to see an example of how you might want to isolate a variable in an equation before you can see that it can be useful?
The stories are irrelevant if you can see the utility for yourself. I mean, you can't have seen all possible equations, so do you assume that any equation you haven't seen can't be worth solving? Surely, you agree that this is a silly statement, yet it's pretty much what you are saying...
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