E equals whatever you need it to to fit the equation.... for instance....3E=9....9/3=E.....E=3..
I'm only 12 so don't make fun of my answer..
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In Algebra, "is" means Equal (=).
It means "not equal to".
8... learn algebra
idiosyncrasies of matrix are the differences between matrix algebra and scalar one. i'll give a few examples. 1- in algebra AB=BA which sometimes doesn't hold in calculation of matrix. 2- if AB=0, scalar algebra says, either A, B or both A and B are equal to zero. this also doesn't hold in matrix algebra sometimes. 3- CD=CE taking that c isn't equal to 0, then D and # must be equal in scalar algebra. Matrix again tend to deviate from this identity. its to be noted that these deviations from scalar algebra arise due to calculations involving singular matrices.
it means: "does not equal to" it mean that it is not equal to that, like 4a isn't equal to 5g. teehee!