Solving Logarithmic Eqns Requiring Properties

 $\log_84\ +\log_8\left(-4x-9\right)=1$  
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For example, x= 3,4.
x= 

 $\log_72\ +\log_7\left(1-x\right)=2$  
x=

 $\log_8\left(10-2x\right)\ -\log_83=\log_830$  
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For example, x= 3,4.
x= 

 $\log\left(3-3x\right)\ -\log7=1$  
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For example, x= 3,4.
x= 

 $\log9+\log\left(6-4x\right)=\log5$  
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For example, x= 3,4.
x= 

 $\log\left(4x-1\right)-\log4=\log16$  
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For example, x= 3,4.
x= 

 $\log7-\log\left(4x\right)=\log31$  
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For example, x= 3,4.
x= 

 $\log2-\log\left(-2x\right)=2$  
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For example, x= 3,4.
x= 

 $\log_84-\log_8\left(-3x-8\right)=\log_849$  
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For example, x= 3,4.
x= 

 $\log_5\left(x^2+6\right)+\log_54=2$  
Enter your answer as a comma-separated list.  
For example, x= 3,4.
x=