\[\boxed{\text{587\ (587).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[9x^{2} + 12x + 4 + 16x^{2} - 1 =\]
\[= 25x^{2} - 10x + 1\]
\[22x = - 2\]
\[x = - \frac{1}{11}\]
\[Ответ:\ x = - \frac{1}{11}.\]
\[- 2m = - 14\]
\[m = 7\]
\[Ответ:x = 7.\]