Hi

Note: 'log' is base 10 and 'ln' is base e, (assume by log2..You mean base 2)

Applying properties of logarithms

1.  

2. log2 x + log2 4 = 3

 

3. ln 3x = 6  e^6 = 3x

4. ln x + ln 1 = 5   e^5  = x*1

5. ln x + ln (2x-1) = 0  e^0 = x(2x-1)

will leave the calculator work up to You 

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