(4289-х)+5637=8001
4289-х=8001-5637
4289-х=2364
х=4289-2364
х=1925
(4289-x)+5637=8001
(5637+4289)-x=8001
9926-x=8001
x= 9926-8001
x=1925
(4289-х)+5637=8001
4289-х=8001-5637
4289-х=2364
х=4289-2364
х=1925
(4289-x)+5637=8001
(5637+4289)-x=8001
9926-x=8001
x= 9926-8001
x=1925