Ответ:
- \(3x-5=x+7\)
\(3x-x=7+5\)
\(2x=12\)
\(x=6\) - \(4y+6=2y+14\)
\(4y-2y=14-6\)
\(2y=8\)
\(y=4\) - \(5x-8=3x+12\)
\(5x-3x=12+8\)
\(2x=20\)
\(x=10\) - \(7y-9=2y-4\)
\(7y-2y=9-4\)
\(5y=5\)
\(y=1\)
Ответ: x = 6; y = 4; x = 10; y = 1.
Ответ: x = 6; y = 4; x = 10; y = 1.