Matrices Help Needed

[yoyohs]

I am trying to solve for A from this equation and have gotten this far.


I am not sure what to do next, dividing by 2 seems like the obvious next step but this is not giving me the correct answer. Any suggestions?

 

[Deleted member 4993]

I am trying to solve for A from this equation and have gotten this far.

View attachment 30805
I am not sure what to do next, dividing by 2 seems like the obvious next step but this is not giving me the correct answer. Any suggestions?

Check your work from 4th line to 5th line - how did you deal with (-1/13)?

 

[blamocur]

I believe you have an error computing the inverted matrix in line 3.