(Х–315)–27=36
Х–315–27=36
Х=36+315+27
Х=378
872–(407+с)=122
872–407–с=122
–с=122-872+407
–с=-343
с=343
(Х–315)–27=36
Х–315–27=36
Х=36+315+27
Х=378
872–(407+с)=122
872–407–с=122
–с=122-872+407
–с=-343
с=343