The are some link of mathematics sites that can help you.
In attached is a pdf file of a book in english language (lessons and exercises).
In pdf file attached Beginning and intermediate algebra.pdf can you study:
Can you find this book in
http://www.wallace.ccfaculty.org/book/book.html
where can you find other exercises and videolessons.
This will your reference book.
other explanations are useful in:
http://www.wtamu.edu/academic/anns/mps/math/mathlab/beg_algebra/
http://www.purplemath.com/modules/
http://online.scuola.zanichelli.it/spazioclil/matematica-e-fisica/