Bonsoir
résoudre les équations :
4x - (7x - 2) = -4
4x - 7x + 2 = -4
-3x = -4 - 2
-3x = -6
x = -6/(-3)
x = 2
-8 + 2(2 + x) - 5x = 11
-8 + 4 + 2x - 5x = 11
-3x = 11 + 8 - 4
-3x = 15
x = -15/3
x = -5
-4(x - 5) - (-2x - 3) = 9
-4x + 20 + 2x + 3 = 9
-2x = 9 - 20 - 3
-2x = -14
x = -14/(-2)
x = 7
4 - 3(x - 2) = 5(4 - 2x) - 6
4 - 3x + 6 = 20 - 10x - 6
10x - 3x = 20 - 6 - 4 - 6
7x = 4
x = 4/7
5(8 - 3x) - (36 - 16x) = 9 - 3(x + 5)
40 - 15x - 36 + 16x = 9 - 3x - 15
16x - 15x + 3x = 9 - 15 - 40 + 36
4x = 45 - 55
x = -10/4
x = -5/2
