Tìm số nguyên x biết: x − 25 = − 18 ;
Giải thích
\[x - 25 = - 18\]
\[\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\, = \, - 18\, + 25\]
\[\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,7\]
Vậy \[x = 7\].
\[x - 25 = - 18\]
\[\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\, = \, - 18\, + 25\]
\[\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,7\]
Vậy \[x = 7\].