Bonjour,
12-(x + x/2) = 12 - (2x/2 + x/2)
12 - (x + x/2) = 12 - 3x/2
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Bonjour,
12-(x + x/2) = 12 - (2x/2 + x/2)
12 - (x + x/2) = 12 - 3x/2