Posted by **Rony** on Sunday, April 18, 2010 at 10:30am.

Solve for x:

1. 3^2x+3^x+1-4=0

2. log3(x=12)+log3(x+4)=2

3. lnx+ln(x+2)=4

4. 3*4^x+4*2^x+8=0

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