how are you suppose to do with these kind of mathematical equations.

Log(10)=log(30)-log( )

how are you suppose to do with these kind of mathematical equations.

Log(10)=log(30)-log( )

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Aliquippa, PA

Dear Yong,

If I understand the problem, what you are asking is what is x if

log(10) = log(30) - log(x)

Whenever you see a "minus" sign in a logarithmic expression think "subtraction." The given expression is mathematically identical to saying

10 = 30/x

and that's the answer. The beauty of this approach is that it is completely independent of the base of the logarithm.

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