Réponses

2014-02-21T17:23:19+01:00
(4x-6)-5(3x-1) =(5x-2)-(9x+20)
4x-6 -15x +5 = 5x-2 -9x -20
-11x -1 = -4x -22
-11x +4x =-22 + 1 
-7x = -21
x = -21/-7
x = 3
2014-02-21T17:46:31+01:00
(4x-6)-5(3x-1) =(5x-2)-(9x+20)
4x-6 -15x +5 = 5x-2 -9x -20
-11x -1 = -4x -22
-11x +4x =-22 + 1 
-7x = -21 
x = 21/7 
x = 3