(10,49-s):4,02=0,805 (10,49-s)=0,805*4,02 (10,49-s)=3,2361 s=10.49-3.2361 s=7,2539 Проверка (10,49-7,2539):4,02=3,2361:4,02=0,805 0,805=0,805