б) Решим уравнение $$10 \frac{10}{17} - (x + \frac{2}{17}) = 8 \frac{9}{17}$$.
Упростим уравнение:
$$10 \frac{10}{17} - x - \frac{2}{17} = 8 \frac{9}{17}$$ $$- x = 8 \frac{9}{17} - 10 \frac{10}{17} + \frac{2}{17}$$ $$- x = 8 \frac{11}{17} - 10 \frac{10}{17} $$ $$-x = - 2 \frac{10}{17} + \frac{1}{17} = -2 \frac{9}{17}$$ $$x = 2 \frac{9}{17}$$Ответ: $$2 \frac{9}{17}$$