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Mathematics 21 Online
OpenStudy (anonymous):

help: FINDING A GRAPH OF THE SYSTEM OF EQUATIONS -2x + y = 3 -x + y = 1

OpenStudy (anonymous):

the one that looks like this http://www.wolframalpha.com/input/?i=-2x+%2B+y+%3D+3%2C+-x+%2B+y+%3D+1

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