\( 4x - 7y = -12 \)
\( -4x + 3y = 12 \)
\( (4x - 4x) + (-7y + 3y) = -12 + 12 \)
\( -4y = 0 \)
\( y = 0 \)
\( 4x - 7(0) = -12 \)
\( 4x = -12 \)
\( x = -3 \)
Ответ: (-3; 0)