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Mathematics 7 Online
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!

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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