Ответ:

  1. \(-5x+6=2x-9\Rightarrow15=7x\Rightarrow x=\frac{15}{7}\).
  2. \(-5x-3=-x+10\Rightarrow-4x=13\Rightarrow x=-\frac{13}{4}\).
  3. \(-0.5x-5.1=x+4.9\Rightarrow-10=1.5x\Rightarrow x=-\frac{20}{3}\).
  4. \(3.5x-2.5=-x-3.6\Rightarrow4.5x=-1.1\Rightarrow x=-\frac{11}{45}\).
  5. \(x=3.6-3x\Rightarrow4x=3.6\Rightarrow x=0.9\).