Question 480817
Many graphing calculators can solve systems of linear equations by converting into reduced row-echelon form (I think the syntax is rref([matrix]) on the TI-84 and TI-NSpire). Wolfram Alpha can also solve those and also systems of inequalities, for example:


http://www.wolframalpha.com/input/?i=x+%2B+y+%3E+2+and+x+-+y+%3C+5