Ответ:

  1. \(6x=28-x\), \(7x=28\), \(x=4\).
  2. \(11x+35=6x\), \(5x=-35\), \(x=-7\).
  3. \(9x+7=3x+37\), \(6x=30\), \(x=5\).
  4. \(9x-7=5x+29\), \(4x=36\), \(x=9\).
  5. \(x+5=8x+19\), \(-7x=14\), \(x=-2\).
  6. \(7-3x=6x-65\), \(72=9x\), \(x=8\).