Bonjour,
7x + 6 = 69
7x = 69 - 6
7x = 63
x = 63/7
x = 9
- 7x - 6 = 8
- 7x = 8 + 6
- 7x = 14
x = - 14/7
x = - 2
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Bonjour,
7x + 6 = 69
7x = 69 - 6
7x = 63
x = 63/7
x = 9
- 7x - 6 = 8
- 7x = 8 + 6
- 7x = 14
x = - 14/7
x = - 2