Решите уравнение: 12. $$ \frac{7}{9}x + \frac{11}{12} = \frac{13}{18} $$

Решение: $$ \frac{7}{9}x + \frac{11}{12} = \frac{13}{18} $$ $$ \frac{7}{9}x = \frac{13}{18} - \frac{11}{12} $$ $$ \frac{7}{9}x = \frac{26}{36} - \frac{33}{36} $$ $$ \frac{7}{9}x = -\frac{7}{36} $$ $$ x = -\frac{7}{36} * \frac{9}{7} $$ $$ x = -\frac{1}{4} = -0,25 $$ Ответ: x = -0,25