B Basic Algebra Question: 3x = 15

mathwonk

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no wait, I made it needlessly complicated, I should have said, from 3x=15 we get log(3x) = log(15), hence log(3) + log(x) = log(5) + log(3), hence log(x) = log(5), so x = 5. I.e. I hid the more difficult division problem that 15/3 = 5 inside the first derivation. my bad. I hope this uses only addition now. (#51).
 
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No kidding. I seriously can't believe we now have a thread of 50 posts talking about how to solve 3x=15.
And now we're up to 52. I think this topic has been exhausted, plus the OP was never seen again.
Thread closed...
 

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