\[\boxed{\mathbf{31}.}\]
\[1)\ 3x - 2y = 1\]
\[2y = 3x - 1\]
\[y = 1,5x - 0,5\]
\[Ответ:(x;1,5x - 0,5);\]
\[x - любое\ число.\]
\[2) - 4x + 3y = - 2\]
\[3y = 4x - 2\]
\[y = \frac{4x - 2}{3}.\]
\[Ответ:\left( x;\frac{4x - 2}{3} \right);x - любое\]
\[\ число.\]