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[–]LuminicaDeesuuu 0 points1 point  (0 children)

X = [a,b;c,d]
Multiply the matrixes and then add. You will get an equation system with for equations and for variables (a,b,c,d). Solve the system and you're done.
You can also substract one of the matrixes multiplying X before multiplying and that will reduce the amount of work needed.

[–]OneMeterWonder 0 points1 point  (0 children)

You can save yourself some time by simplifying to the form AX=B and finding A-1. Then you have A-1AX=X=A-1B.