Ответ:
x + 18 = 23; \(x = 23 - 18 = 5\).
228 : x = 12; \(x = 228 : 12 = 19\).
(x − 3) : 4 = 6; \(x − 3 = 24\), \(x = 27\).
x : 4 − 3 = 6; \(x : 4 = 9\), \(x = 36\).
36 : (x − 2) = 4; \(x − 2 = 9\), \(x = 11\).
36 : x − 2 = 4; \(36 : x = 6\), \(x = 6\).
Ответ: 1) x = 5; 2) x = 19; 3) x = 27; 4) x = 36; 5) x = 11; 6) x = 6.
