Matrix equations: scalar multiplication

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Problem

Solve for X.
3X+[12107]=[132514]3X+\left[\begin{array}{rr}-1 & -2 \\ 10 & -7 \end{array}\right]=\left[\begin{array}{rr}-13 & -2 \\ -5 & 14 \end{array}\right]
X, equals
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