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September 15, 2014

September 15, 2014

Posted by **Katie** on Saturday, April 6, 2013 at 1:04am.

0.4^x = 27

- math -
**Reiny**, Saturday, April 6, 2013 at 1:18am27 = .4^x

3^3 = .4^x

(2^b)^3 = .4^x

2^(3b) = (2/5)^x

2^(3b) = (2/(2^a))^x

2^(3b) = 2^x / 2^(ax)

2^(3b) 2^(ax) = 2^x

2^(3b+ax) = 2^x

3b + ax = x

x-ax = 3b

x(1-a) = 3b

x = 3b/(1-a)

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