Treść zadania

Najlepsze rozwiązanie

• 

  2 0

  sonar 7.9.2012 (20:31)

  -3(x+2) +(-3)(x+2) - (-2x+ 4) = 3x+ 12
  
  -3x - 6 + (-3x - 6) + 2x - 4 = 3x + 12
  
  - 3x - 6 - 3x - 6 + 2x - 4 = 3x + 12
  
  -3x - 3x + 2x - 6 - 6 - 4= 3x + 12
  
  - 4x - 16 = 3x + 12
  
  -4x - 3x = 12 + 16
  
  -7x= 28
  
  x= 28 : (-7)
  
  x= - 4
  
  
  
  spr.
  
  -3(x+2) +(-3)(x+2) - (-2x+ 4) = 3x+ 12
  
  -3(-4 + 2) + (-3)(-4+2) - (-2*(-4)+4) = 3*(-4) + 12
  
  -3*(-2) + (-3)(-2)- (8+4)= - 12 + 12
  
  6 +6 - 12= 0
  
  0 = 0
  
  L=P
  
  
  
  
  
  4(5x - 7) - 4(8-2x) +3(2x-4) = -3(5x+ 2)
  
  20x - 28 - 32+ 8x+ 6x - 12= - 15x - 6
  
  20x + 8x + 6x - 28 - 32 - 12= - 15x - 6
  
  34x- 72= - 15x - 6
  
  34x + 15x = - 6 + 72
  
  49x = 66
  
  x= 66 : 49
  
  x= 1 i 17/49
  
  
  spr.
  
  4(5x - 7) - 4(8-2x) +3(2x-4) = -3(5x+ 2)
  
  4(5*1 i 17/49 - 7) -4(8-2*1 i 17/49) +3(2*1 i 17/49-4) = -3(5*1 i 17/49 + 2)
  
  4(5*66/49 - 7) -4(8 - 2*66/49) + 3(2*66/49-4) = -3(5*66/49 + 2)
  
  4(330/49 - 343/49)-4(392/49- 132/49)+3(132/49 - 196/49)= -3(330/49+98/49)
  
  4*(-13/49) -4*260/49+3*(-64/49)= -3 * 428/49
  
  -52/49 - 1040/49 - 192/49 = 1284/49
  
  1284/49 = 1284/49
  
  26 i 10/49 = 26 i 10/49
  
  L=P
  
  
  
  
  
  
  -3(x+9) -5(-x+2) - 3(-6x + 4) = -3(3x+ 2)
  
  -3x - 27 + 5x - 10 +18x - 12 = -9x - 6
  
  -3x + 5x + 18x - 27 - 10 - 12 = -9x - 6
  
  20x -49= - 9x - 6
  
  20x + 9x = - 6 + 49
  
  29x = 43
  
  x= 43 : 29
  
  x= 43/29
  
  x= 1 i 14/29
  
  
  
  spr.
  
  -3(x+9) -5(-x+2) - 3(-6x + 4) = -3(3x+ 2)
  
  -3(1 i 14/29 + 9)-5(-1 i 14/29 + 2) -3(-6* 1i 14/49+4) = -3(3*1 i 14/49 + 2)
  
  -3(43/29 + 261/29)-5* 15/29 -3(-6*43/29 + 116/29) = -3(3*43/29 + 58/29)
  
  -3* 304/29 - 75/29 -3(- 258/29 + 116/29) = -3(129/29 + 58/29)
  
  -912/29 - 75/29 -3(- 142/29) = -3* 187/29
  
  -912/29 - 75/29 + 426/29 = 561/29
  
  561/29 = 561/29
  
  19 i 10/29 = 19 i 10/29

  Dodawanie komentarzy zablokowane - Zgłoś nadużycie