Question

So i got this equation, i want to solve for X, how do i do it:
(I-D)X=E

Answer 1

(I-D)X=E divide both sides by (I-D)
X=E/(I-D) or in a slightly more pretty format:
\[X=\frac{E}{I-D}\]

Answer 2

okay but this isnt a normal equation its a matrix equation

Answer 3

you see i need to isolate that x, which is a output matrix

Answer 4

\[X=E\times(I-D)^{-1}\]

Answer 5

would be the normal matrix notation, if I remember correctly.

Answer 6

okay thanks

Answer 7

not quite

Answer 8

I havent worked in matricies in a long time, so go for it amistre.

Answer 9

(I-D)X = E

we have to multiply by the inverse on the LEFT of each term

(I-D)^-1 (I-D)X = (I-D)^-1 E

X = (I-D)^-1 E

Answer 10

B^-1 A not = A B^-1 in general

Answer 11

yeah, i vaguely remember that now, lol

Answer 12

:)

Answer 13

nice job smart guy

Answer 14

i learn from my mistakes; and i have made alooot of mistakes ;)

Answer 15

okay man heres your medal