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OpenStudy (anonymous):
Use the substitution method to solve the following system of equations. 3x + y – z = 2 2x + y + 2z = 8 2x – 3y + z = 21 i need this explained to me.
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OpenStudy (anonymous):
(3, –4, 3) // (–3, 4, 3) // (3, 4, 3) // (3, 4, –3)
OpenStudy (anonymous):
first one
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