Ответ:

1) \(x + 16 = 46\)

\(x = 46 - 16 = 30\).

2) \(48 - x = 48\)

\(x = 48 - 48 = 0\).

3) \(x - 27 = 0\)

\(x = 0 + 27 = 27\).

Ответ: 1) \(x = 30\); 2) \(x = 0\); 3) \(x = 27\).