Ответ:
1) \(3\,189-a=1\,068+129\)
\(3\,189-a=1\,197\)
\(a=3\,189-1\,197=1\,992\)
2) \(6\,657+x=7\,075+1\,001\)
\(6\,657+x=8\,076\)
\(x=8\,076-6\,657=1\,419\)
Ответ: \(a=1\,992\), \(x=1\,419\).
1) \(3\,189-a=1\,068+129\)
\(3\,189-a=1\,197\)
\(a=3\,189-1\,197=1\,992\)
2) \(6\,657+x=7\,075+1\,001\)
\(6\,657+x=8\,076\)
\(x=8\,076-6\,657=1\,419\)
Ответ: \(a=1\,992\), \(x=1\,419\).