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Sagot :

=3x-6+15-5x
=-2x+9
Normalement c est ca
A=3(x-2)+5(3-x)
 = 3*x -2*3 +5*3 -x *5
  = 3x -6 +15 -5x
  = 3x - 5x -6 +15
  = -2x + 9

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