\left\{ \begin{array} { l } { X = 3 - m } \\ { y = 1 + 2 m } \end{array} \right.
Solve for X, m, y (complex solution)
y=2m+1
X=3-m
m\in \mathrm{C}
Solve for X, m, y
y=2m+1
X=3-m
m\in \mathrm{R}
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