Write the equations in matrix form :
x-y=-5
3x+2y=-5
"\\begin{pmatrix}\n 1 & -1 \\\\\n 3 & 2\n\\end{pmatrix}" "\\begin{pmatrix}\n x \\\\\n y\n\\end{pmatrix}" ="\\begin{pmatrix}\n -5 \\\\\n -5\n\\end{pmatrix}"
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