Пошаговое объяснение:

[tex]3 \frac{7}{17} - (x + 1 \frac{4}{17} ) = 1 \frac{9}{17} \\ x + 1 \frac{4}{17} = 3 \frac{7}{17} - 1 \frac{9}{17} \\ x + 1 \frac{4}{17} = 1 \frac{15}{17} \\ x = 1 \frac{15}{17} - 1\frac{4}{17} \\ x = \frac{11}{17} [/tex]