Ответ:\(x+54=112\)\(x=112-54=58\).\(256-x=98\)\(x=256-98=158\).\(x-214=553\)\(x=553+214=767\).\(168+x=773\)\(x=773-168=605\).Ответ: 1) 58; 2) 158; 3) 767; 4) 605.