(285-(x/14-431))/6=36
(285-(х:14-431)):6=36 285-(х:14-431)=36*6 285-(х:14-431)=216 х:14-431=285-216 х:14-431=69 х:14=69+431 х:14=500 х=500*14 х=7000 Ответ:7000