Tìm số nguyên x , biết:
Giải thích
a) \(x - 11 = 185 - \left( {132 + 185} \right)\) \(x - 11 = 185 - 132 - 185\) \(x - 11 = \left( {185 - 185} \right) - 132\) \(x - 11 = - 132\) \(x = - 132 + 11\) \(x = - \left( {132 - 11} \right)\) \(x = - 121\) Vậy \[x = - 121\]. | b) \(18 - \left( {x + 14} \right):3 = 27\) \(\left( {x + 14} \right):3 = 18 - 27\) \(\left( {x + 14} \right):3 = - 9\) \(x + 14 = \left( { - 9} \right).3\) \(x + 14 = - 27\) \(x = - 27 - 14\) \(x = - \left( {27 + 14} \right) = - 41\) Vậy \[x = - 41\]. |