Когда турист прошел 1 км пути и половину остатка,то ему осталось пройти одну третью( дробью) всего пути и ещё 1 км. Определить весь путь.
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АлгебраАвтор:
annaliseo3d6х-весь путь
1+(х-1)/2+х/3+1=х
(х-1)/2+х/3+2=х
3(х-1)/6+2х/6+12/6=х
(3х-3+2х+12)/6=х
(5х+9)/6=х
5х+9=6х
-х=-9
х=9 (км) - длина всего пути
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