Решение:
б) $ \begin{array}{@l|l} \begin{array}{l} 79 + x = -356,\\ x = -356 - 79,\\ x = -435; \end{array} & \snippet{name: op_column, sign: '+', x: 356, y: 79, z: 435} \end{array} $;
в)$ \begin{array}{@l|l} \begin{array}{l} x - 57 = -493,\\ x = -493 + 57,\\ x = -436; \end{array} & \snippet{name: op_column, sign: '-', x: 493, y: 57, z: 436} \end{array} $;
г) $ \begin{array}{@l|l} \begin{array}{l} 167 - x = 39,\\ x = 167 - 39,\\ x = 128; \end{array} & \snippet{name: op_column, sign: '-', x: 167, y: 39, z: 128} \end{array} $;
д)$ \begin{array}{@l|l} \begin{array}{l} -542 + x = 542,\\ x = 542 + 542,\\ x = 1084; \end{array} & \snippet{name: op_column, sign: '+', x: 542, y: 542, z: 1084} \end{array} $.
Ответ:
б) −435;
в) −436;
г) 128;
д) 1084.