Решите уравнение: 7x-5*(2x+1)=5x+15.

\[7x - 5 \cdot (2x + 1) = 5x + 15\]

\[7x - 10x - 5 = 5x + 15\]

\[- 8x = 20\]

\[x = - \frac{20}{8}\]

\[x = - 2,5.\]

\[Ответ:\ x = - 2,5.\ \]