Réponses

2012-11-11T14:55:48+01:00

a)-2(3-2x) = x-8

  = -2X3-(-2)X2x = x-8

  = (-6)-(-4x) = x-8

  = (-6)-(-4x)-x = x-x-8

  = (-6)-(-3x) = 8

  = (-6)-(-3x)-8 = 8-8

  = 2-(-3x) = 0

  = 0 = 2+3x