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OpenStudy (anonymous):
Can you help me solve the following matrices? x+2y-z=0, -x+y=5, x+2z=6 Basically I know how matrices work, but I really don't know how to do this without using a system of equations (I'm apparently supposed to be able to figure this out without doing that). Thanks in advance!
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OpenStudy (anonymous):
|dw:1382314077655:dw| find cofactors of A then adjoint A and finally \[X=A ^{-1}B\] where |dw:1382315109406:dw|
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