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Sagot :

a. 5x=3x+3
   5x-3x=3
   2x=3
   x=3/2
b. 8x=12x+4
   8x-12x=4
  -4x=4
  x=-1
f. 5+6x=-x-9
  6x+x=-9-5
  7x=-14
  x= -14/7=-2
g. 11x+3=8x+7
   11x-8x=7-3
  3x=4
x= 4/3

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