Soit x ce nombre. On a l'équation:
5x + 9= 2x
5x - 2x = -9
3x = -9
x = (-9) / 3
x = -3
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Soit x ce nombre. On a l'équation:
5x + 9= 2x
5x - 2x = -9
3x = -9
x = (-9) / 3
x = -3