Respuesta :

Answer:

C. [tex]-\frac{1}{2}[/tex]

Step-by-step explanation:

  • [tex]20x - 40 = 100x[/tex]
  • [tex]20x - 100x = 40[/tex]
  • [tex]- 80x = 40[/tex]
  • [tex]x = -\frac{40}{80}[/tex]
  • [tex]x = -\frac{1}{2}[/tex]