Ответ:

  1. \(3x=36-x\), \(4x=36\), \(x=9\).
  2. \(13x+24=9x\), \(4x=-24\), \(x=-6\).
  3. \(8x+5=5x+29\), \(3x=24\), \(x=8\).
  4. \(7x-4=4x+17\), \(3x=21\), \(x=7\).
  5. \(x+2=5x+18\), \(-4x=16\), \(x=-4\).
  6. \(7-4x=2x-23\), \(30=6x\), \(x=5\).