Вопрос:

Решите уравнение: 10,5/(x-3,6)=51/(x+1,8).

Ответ:

\[\frac{10,5}{x - 3,6} = \frac{51}{x + 1,8}\]

\[10,5(x + 1,8) = 51(x - 3,6)\]

\[10,5x + 18,9 = 51x - 183,6\]

\[10,5x - 51x = - 183,6 - 18,9\]

\[- 40,5x = - 202,5\]

\[x = - 202,5\ :( - 40,5)\]

\[x = 5.\]