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Using The Inverse Matrix Method To Solve Equations..


David
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Right, ive been revising all day and im not feeling too good at all. I'm trying to use the inverse matrix method to solve a simple simultaneous equation.

In the attached example I can not see how to get from the first to the second line?! =S

I will be kicking myself when I realise this..you know the feeling!!

Thanks,

Dave

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Edited by David
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