Вопрос:

Ответ:

\[(8x + 10)(3 - x) =\]

\[= (11 - 2x)(4x + 5) - 5\]

\[24x - 8x^{2} + 30 - 10x =\]

\[= 44x + 55 - 8x^{2} - 10x - 5\]

\[- 20x = 20\]

\[x = - 1\]

\[Ответ:\ - 1.\]