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Matrix equations: addition & subtraction

Solve for XX.
[1281337]X=[86112210]\left[\begin{array}{rr}12 & 8 & -1 \\ -3 & -3 & 7 \end{array}\right]-X=\left[\begin{array}{rr}8 & 6 & -1 \\ -12 & 2 & 10\end{array}\right]
X=X=