Ответ:
- \(X+16=25\)
\(X=25-16=9\) - \(56:X=8\)
\(X=56:8=7\) - \(X-15=13\)
\(X=13+15=28\) - \(X:7=5\)
\(X=5\cdot7=35\) - \(14\cdot X=28\)
\(X=28:14=2\) - \(13-X=5\)
\(X=13-5=8\) - \(31+X=42\)
\(X=42-31=11\)
Ответ: 1) X = 9; 2) X = 7; 3) X = 28; 4) X = 35; 5) X = 2; 6) X = 8; 7) X = 11.
