Вопрос:

Ответ:

\[(3x - 2)(5x + 3) - 15x^{2} = 7\]

\[15x^{2} - 10x + 9x - 6 - 15x^{2} = 7\]

\[- x = 7 + 6\]

\[- x = 13\]

\[x = - 13.\]