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Mathematics 4 Online
OpenStudy (anonymous):

How do I solve this system by substitution? [-x - y - z = -8 [-4x 4y 5z = 7 [2x + 2z = 4

OpenStudy (compassionate):

http://www.jcoffman.com/Algebra2/ch3_6.htm

OpenStudy (anonymous):

Ah, thanks!

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