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September 20, 2014

September 20, 2014

Posted by **marcus** on Wednesday, November 21, 2012 at 3:07am.

First step I get e^1x-7 =4e

For the example in my book, the next step they divided by e. But I have no idea how to do this, or what involves?

- precalculus -
**Kay**, Wednesday, November 21, 2012 at 4:44amYou have to apply the indices rule: a^m /a^n= a^(m-n)

so e^(x-7)/e^1= e^(x-8). We then get: e^(x-8)=4 Use ln: x-8= ln4 so x=8+ln4

OK?

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