помогите плиз 3,5*x+4,08*x+2*x=4,79

1)3.5*x + 4.08*x + 2*x = 4.79
  ( 3.5x + 4.08x + 2x =  9.58x )
2) 9.58x = 4.79
3) x = 4.79/9.58
4) x = 0.5