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Algebra 21 Online
OpenStudy (anonymous):

write the system as a matrix equation. Then identify the coefficient matrix, the variable matrix, and the constant matrix. { 6a + 5b - 5c = 6 -7a + 7b +4c = 6 -7a - 4b - 9c = -1

OpenStudy (rajee_sam):

|dw:1367548608430:dw| |dw:1367548653908:dw|

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