Question

calcular la distancia entre las rectas paralelas 3x-y+5=0 y 3x-y-8=0

Answer 1

3x-y+5=0
3x=5+y
x= (5+y)/3
2) 3x-y-8=0
    3(5+y)/3-y-8=0
     5+y-y-8=
      = 8-5
  = 3