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Najlepsze rozwiązanie

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  sonar 23.2.2011 (22:05)

  -7x +5=11x +41
  -7x - 11x = 41 - 5
  - 18 x = 36
  x= 36 : (-18)
  x= -2
  
  spr.
  -7 * (-2) + 5 = 11 * (-2) + 41
  14 + 5 = - 22 + 41
  19 = 19
  L=P
  
  
  
  -2x - 7=23x - 7
  -2x - 23 x= -7 + 7
  - 25x = 0
  x= 0
  
  
  spr.
  -2x - 7 = 23x - 7
  0 - 7= 0 - 7
  -7 = -7
  L=P
  
  
  3x + 9 =-3x + 9
  3x + 3x = 9 -9
  6c = 0
  x= 0
  
  spr.
  3x +9 = -3x+ 9
  0 +9 = 0 + 9
  9 = 9
  L=P
  
  
  
  
  -27x +2= 2x+ 59
  -27x -2x = 59 -2
  -29x = 57
  x= 57 : (-29)
  x= - 1 i 28/29
  
  
  spr.
  - 27x + 2 = 2x + 59
  - 27 * (- 1 i 28/29) + 2= 2* (-1 i 28/29) + 59
  - 27 * (-57/29) + 2= 2 * ( - 57/29 )+ 59
  1539/29 + 2 = - 114/29 + 59
  53 i 2 /29 + 2= - 3 i 27/29 + 59
  55 i 2/29 = 55 i 2/29
  L=P
  
  
  
  45x - 19 =19x -45
  45x - 19x = -45 + 19
  26x = - 26
  x= -26 : 26
  x = -1
  
  spr.
  45x - 19 = 19 x- 45
  45 * (-1) -19 = 19 * (-1) - 45
  - 45 - 19 = - 19 - 45
  -64 = - 64
  L=P
  
  
  
  82x - 9 = -18x+1
  82x + 18x = 1 + 9
  100x = 10
  x= 10/100
  x= 1/10
  
  spr.
  82x - 9 = -18x + 1
  82 * 1/10 - 9 = -18 * 1/10 + 1
  82/10 - 9 = - 18/10 + 1
  8 i 2/10 - 9 = - 1 i 8/10 + 1
  - 8/10 = - 8/10
  L=P

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