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December 20, 2014

December 20, 2014

Posted by **Lena** on Monday, February 16, 2009 at 6:37pm.

4^t = 8^t-1

Just by looking at it, I know that x = 3 but how would I figure this out mathematically?

- simple math -
**Reiny**, Monday, February 16, 2009 at 6:42pm4^t = (2^2)^t = 2^(2t)

8^(t-1) = (2^3)^(t-1) = 2^(3t-3)

so 2^(3t-3) = 2^(2t)

then 3t-3 = 2t

t = 3

- simple math -
**Lena**, Monday, February 16, 2009 at 6:44pmThanks so much :)

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