\[4 \cdot (5x + 2) = 10 \cdot (2x - 3) + 15\]
\[20x + 8 = 20x - 30 + 15\]
\[20x - 20x = - 15 - 8\]
\[0x = - 23\]
\[Ответ:нет\ решения.\]