Bonjour,
1)
x + 8 = 2
x = 2 - 8
x = - 6
2)
- 14x = 7
x = - 7/14
x = - 1/7
3)
- 5x - 2 = 13
- 5x = 13 + 2
- 5x = 15
x = - 15/5
x = - 3
4)
7x + 29 = 3x - 7
7x - 3x = - 7 - 29
4x = 36
x = 36/4
x = 9
5)
3 + 2 (6x - 1) = 2x - 1
3 + 12x - 2 = 2x - 1
12x - 2x = - 1 - 3 + 2
10x = - 2
x = - 2/10
x = - 1/5
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Bonjour,
1)
x + 8 = 2
x = 2 - 8
x = - 6
2)
- 14x = 7
x = - 7/14
x = - 1/7
3)
- 5x - 2 = 13
- 5x = 13 + 2
- 5x = 15
x = - 15/5
x = - 3
4)
7x + 29 = 3x - 7
7x - 3x = - 7 - 29
4x = 36
x = 36/4
x = 9
5)
3 + 2 (6x - 1) = 2x - 1
3 + 12x - 2 = 2x - 1
12x - 2x = - 1 - 3 + 2
10x = - 2
x = - 2/10
x = - 1/5