Below are some sites that will help you with solving a system
http://www.purplemath.com/modules/systlin4.htm
http://cstl.syr.edu/fipse/Algebra/Unit5/subst.htm
Below are some sites that will help you with graphing: (Chapter 3 Test)
1. http://www.mathsisfun.com/data/straight_line_graph.html
2. http://www.columbia.edu/itc/sipa/math/finding_equation.html
3. http://www.webmath.com/_answer.php
4.
Below are some sites to get tutoring or practice on simplifying. To go to the given site just click on the white lettering and it will take you directly to the site:
http://www.algebrahelp.com/worksheets/view/simplifying/distribution.quiz is a site
to quiz yourself on the distributive property and algebraic terms.
http://www.algebrahelp.com/worksheets/view/simplifying/multiplication.quiz is a site
to quiz yourself on multiplying with algebraic terms.
http://www.algebrahelp.com/worksheets/view/simplifying/oops.quiz is a
site that will go through the steps of using the order or operations and
working with variables.
http://www.math.com/school/subject2/lessons/S2U2L5GL.html is a site
that will go through some easy simplifying questions step by step.