Question 135161
Solve: 4^(1-x)=3*5^x 
Take the log of both sides to get:
(1-x)log4 = log3 + xlog5
log4-xlog4 = log3 + xlog5
x(log4-log5) = log2-log4
x(log(4/5)) = log(1/2)
x = [log(1/2)]/[log(4/5)]
x = 3.1063
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Cheers,
Stan H.