Question 172951
Apply log rules.  
The site gives you the basics:
http://www.purplemath.com/modules/logrules.htm
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log3 (x-5)=2
x-5 = 3^2
x-5 = 9
x = 14
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5+log4 2x=7
log4 2x=7-5
log4 2x=2
2x = 4^2
2x = 16
x = 8