LOGARITHMS

Here you have a link to study the logarithms. If fou read carefully it before the explanation, it will be much easier for you.

http://www.vitutor.com/alg/log/logarithms.html

From this link we're going to study the first 5 points, including the logarithmic function.

And for the equations: LOGARITHM EQUATIONS

Some webs with exercises to improve your knowledge (with keys)

http://www.mathworksheets4kids.com/logarithms/solving-equations-medium1.pdf 

https://maths.mq.edu.au/numeracy/web_mums/module2/Worksheet27/module2.pdf
exercises (with key) 


Y por si lo quereis en español:

http://www.ejerciciosweb.com/logaritmos/ejercicios-resueltos.html


EXPONENTIAL EQUATIONS

http://www.purplemath.com/modules/solvexpo.htm

Finally one video for easy exponential equations: