Basics of Systems of Linear Equations

Determine which vectors are solutions to the following SLE [select all that apply]:
x1  5x2 +x3=2x1 +5x2 3x3= 6\begin{alignedat}{8} x_1\ &-&\ 5x_2\ &+& x_3 &=& 2\\ -x_1\ &+& 5x_2\ &-& 3x_3 &=&\ -6 \end{alignedat}

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