Bonjour,
4x + 15 = 7x + 24
4x - 7x = 24 - 15
- 3x = 9
x = - 9/3
x = - 3
23x + 31 = 16x + 17
23x - 16x = 17 - 31
7x = - 14
x = - 14/7
x = - 2.
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Bonjour,
4x + 15 = 7x + 24
4x - 7x = 24 - 15
- 3x = 9
x = - 9/3
x = - 3
23x + 31 = 16x + 17
23x - 16x = 17 - 31
7x = - 14
x = - 14/7
x = - 2.