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Mathematics 20 Online
OpenStudy (anonymous):

solve the matrix equation for x and y |2 -3| |x| = |-8| |3 -4| |y| |-9|

OpenStudy (amistre64):

augment A with .... well its usually denoted b in my book

OpenStudy (amistre64):

or, you can try to work out an inverse, but augmenting tends to be the simpler route

OpenStudy (amistre64):

row reduce |2 -3| -8| |3 -4| -9|

OpenStudy (anonymous):

i am not sure but can cramers rule be used?

OpenStudy (amistre64):

gotta make sure you are up to date with your elementary row operations

OpenStudy (amistre64):

yes

OpenStudy (amistre64):

or even the wolf rref{{2,-3,-8},{3,-4,-9}} http://www.wolframalpha.com/input/?i=rref%7B%7B2%2C-3%2C-8%7D%2C%7B3%2C-4%2C-9%7D%7D

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