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Exercice 1:
Simplifie le plus possible les expressions suivantes.
A= x + 2x + 7x + 9y + 3x - 5y
B = 5 X 2x + 4 + 7x
C = 3t + 4t + 7t - 5
D = 3 xax 5
E = 8 x axbx3
F = 2 xa + 5 xa

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