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a) 4x - 13 = 5
4x = 5 + 13
4x = 18 => x = 18/4 = 9/2
b) 35 - 4x = x
35 = x + 4x
5x = 35 => x = 35/5 = 7
c) 4x = 7x - 3
4x -7x = -3
-3x = -3 => x = 4/3 = 1
d) 7 = 23 + 8x
7 - 23 = 8x
- 16 = 8x
8x = - 16 => x = -16/2 = -8
e) 2 = 11 + 3m
2 - 11 = 3 m
3 m = - 9 => m = -9/3 = -3
Résoudre les équations suivantes :
a) 6x - 8 = 4x + 14
6x - 4x = 14 + 8
2x = 22 => x = 22/2 = 11
b) 2y - 6 = 3y - 9
2y - 3y = -9 + 6
-y = -3 => y = 3.
c) 8 + 2x = 26 + 5x
2x - 5 = 26 - 8x
2x - 8x = 26 + 5
-6x = 31 => x = - 31/6
d) 5+ 3y = -y -7
3y + y = -7 - 5
4y = - 12 => x = -12/4 = - 3
Bonne soirée.