Question 960014

here are some very good links for you:

http://hotmath.com/hotmath_help/topics/writing-systems-of-linear-equations-from-word-problems.html

http://hotmath.com/hotmath_help/topics/solving-linear-quadratic-systems.html

http://hotmath.com/hotmath_help/topics/solving-systems-of-linear-equations-using-graphing.html

http://www.mathsisfun.com/algebra/systems-linear-equations.html