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OpenStudy (anonymous):
Solve x + 2y + z = 5 2x – y + z = 4 3x + y + 4z = 1
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OpenStudy (anonymous):
add 2nd and third equation
OpenStudy (anonymous):
Add the 2nd and the 3rd equation first and tell what you got?
OpenStudy (anonymous):
you will get 5x+5z=5 x+z=1
OpenStudy (anonymous):
2x - y + z = 4 3x + y + 4z = 1 Just add them..
OpenStudy (anonymous):
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