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OpenStudy (anonymous):
Guestion: x − 4y + 2z − 3x − 3y + 2z = ? −2x + 7y + 4z −2x −7y + 4z −3x + 7y + 4z −3y − 7z + 4z
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OpenStudy (anonymous):
\[ \left( 1 -3 \right) x + \left( -4 -3 \right) y + \left( 2 + 2 \right) z = -2x -7y +4z \]
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