4^x = 9(5^x)

Common logarithms
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1 Answer

4x=9(5x),

xlog(4)=log(9)+xlog(5),

x(log(4)-log(5))=log(9),

xlog(⅘)=log(9),

x=log(9)/log(0.8)=-9.8467 approx.

by Top Rated User (1.1m points)

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