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résolu

a)-2(3-2x) = x-8 b) 8 (1+7x)=-3(5-2x) c) 3-3(2x-7)=2x-5(x-3) d)2x-3(2-2x)=8(-x+1)+2

Répondre :

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

 

 

 

 

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