Ответ:\(x + 27 = 64\)\(x = 64 − 27 = 37\)\(a − 36 = 18\)\(a = 18 + 36 = 54\)\(81 − c = 67\)\(c = 81 − 67 = 14\)Ответ: \(x = 37\), \(a = 54\), \(c = 14\).