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Sagot :

PAN59
2(x+1)-3(x-2) = -(2x+1)

2(x+1) - 3(x-2) + 2x + 1=0

2x+2-3x+6+2x+1=0

x + 9=0

x = -9

-3(x+1) +2(2x+1) = - (2x+1)
-3x-3+4x+2+2x+1=0
3x=0
x=0

3(2x+1) -4(x-2) = 2(x/2+1)
6x+3-4x+8 = x+2
6x+3-4x+8-x-2=0
x+9=0
x=-9
a) 2(x+1)-3(x-2)=-(2x+1)
   2x+2-3x+6=-2x-1
   2x-3x+2x=-1-2-6
   x=-9
b)-3(x+1)+2(2x+1)=-(2x+1)
  -3x-3+4x+2=-2x-1
  -3x+4x+2x=-1+3-2
  3x=0  x=0
c) 3(2x+1)-4(x-2)=2(x/2+1)
   6x+3-4x+8=x+2
   6x-4x-x=2-3-8
   x=-9

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