\[y = 2,8x - 5\ \ \ \ \ и\ \ \ \ y = - 1,2x + 7\]
\[2,8x - 5 = - 1,2x + 7\]
\[4x = 12\]
\[x = 3.\]
\[y = - 1,2 \cdot 3 + 7 = 3,4.\]
\[Ответ:(3;3,4).\]