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OpenStudy (anonymous):
solve the system of equations x+y+z = 7
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OpenStudy (mokeira):
is this everything
OpenStudy (usukidoll):
yeah man... you have three unknowns... don't you need like 3 equations first so you can get your x y and z value? If this is a stand alone question, then it feels like probability... as in how many combinations for x+y+z=7
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