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2 x + 6 = 3
2 x = 3 - 6
2 x = - 3
x = - 3/2
5 x + 2 = 7 x - 9
5 x - 7 x = - 9 -2
- 2 x = - 11
x = 11/2
4 x - 9 = - 2
4 x = - 2 + 9
4 x = 7
x = 7/4
6 x = 12 x + 3
6 x - 12 x = 3
- 6 x = 3
x = - 3/6 = - 1 /2
8 x + 6 = 9 - 3 x
8 x + 3 x = 9 - 6
11 x = 3
x = 3 /11
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bonsoir
2 x + 6 = 3
2 x = 3 - 6
2 x = - 3
x = - 3/2
5 x + 2 = 7 x - 9
5 x - 7 x = - 9 -2
- 2 x = - 11
x = 11/2
4 x - 9 = - 2
4 x = - 2 + 9
4 x = 7
x = 7/4
6 x = 12 x + 3
6 x - 12 x = 3
- 6 x = 3
x = - 3/6 = - 1 /2
8 x + 6 = 9 - 3 x
8 x + 3 x = 9 - 6
11 x = 3
x = 3 /11