Tìm số nguyên \[x\] biết \(2 - \left( {x - 7} \right) = 6 - 15\).

\(2 - \left( {x - 7} \right) = 6 - 15\)

\[\begin{array}{l}\,\,\,\,2 - \left( {x - 7} \right) = \,\,\,\, - 9\\\,\,\,\,\,\,\,\,\,\,\,\,x - 7\,\,\,\, = \,2 - \left( { - 9} \right)\,\,\\\,\,\,\,\,\,\,\,\,\,\,\,x - 7\,\,\,\, = \,\,\,\,\,\,11\\\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\, = \,\,\,11 + 7\\\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\, = \,\,\,\,\,\,\,18\end{array}\]

Vậy \[x = 18\].