Réponse :
Bonjour
Explications étape par étape
Résolutions d'équations
A = -2 ( 3 -2x) = x -8
A = -6 +4x = x -8
A = 4x -x = +6 -8
A = 3x = -2
A) x = -2/3
B) 8 ( 1 +7x) = -3 (5 -2x)
B) 8 +56x = -15 +6x
B) 56x -6x = -8 -15
B) 50x = -23
B) x = -23/50
C = 3 -3(2x -7) = 2x -5 (x -3)
C = 3 -6x +21 = 2x -5x +15
C = -6x -2x +5x = -3 -21 +15
C) -3x = -9
C) x = 9/3 = 3
D) 2x -3 ( 2 -2x) = 8 (-x +1) +2
D) 2x -6 +6x = -8x +8 +2
D) 8x + 8x = +6 +10
D) 16x = 16
D) x = 16/16 = 1
