Ответ:

  1. \(7x+6=3x\) → \(4x=-6\) → \(x=-\frac{3}{2}\).
  2. \(3+4x=9x-11\) → \(14=5x\) → \(x=\frac{14}{5}\).
  3. \(2(x+5)=-9\) → \(2x+10=-9\) → \(2x=-19\) → \(x=-\frac{19}{2}\).
  4. \(2(x-1)-x=11\) → \(x-2=11\) → \(x=13\).
  5. \(2(x-13)=x+13\) → \(2x-26=x+13\) → \(x=39\).
  6. \(3(x+1)-2(x-1)=4\) → \(3x+3-2x+2=4\) → \(x=-1\) → \(x=-1\).