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Mathematics 9 Online
OpenStudy (anonymous):

Given the system of equations: What is the value of x? http://media.apexlearning.com/Images/201306/27/1bd295b1-8fa5-4845-ad93-086cdee6d13c.gif A. x = -60 B. x = 9 C. x = -12 D. x = 4

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