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Sagot :

AYUDA

bjr

k(a+b) = ka + kb

donc

A = 11 + 2*x + 2*(-6) = 11 + 2x - 12 = 2x - 1

et

B = -2*x - 2*(-5) - 3*7 - 3*(-4x)

  = -2x + 10 - 21 + 12x

   = 10x - 11

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