(×-1 9/17)+2 14/17=5 5/17
(×-1 9/17)+2 14/17=5 5/17; Х-1 9/17=5 5/17-2 14/17; Х-1 9/17=4 22/17-2 14/17;, Х=2 8/17+1 9/17; Х=3 17/17; Х=4