Solving
Sources
Holt, Rinehart, & Winston. "Systems of Equations and Inequalities." http://my.hrw.com/math06_07/nsmedia/homework_help/alg1/
alg1_ch06_05_homeworkhelp.html (accessed August, 5, 2010)
Stapel, Elizabeth. "Solving Linear Inequalities: Advanced Examples." Purplemath. Available from http://www.purplemath.com/modules/
ineqlin3.htm. Accessed 15 August 2010