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Sagot :

bonjour,

A = 5xn+7xn

= 12xn

E = 3y-3y

=O

B = 9x - 4x

= 5x

F = 3n² - 2n²

= n²

C = y + 3y

= 4y

G = 5x - 4x + 12x

= 13x

D = 4x - x

= 3x

H = 6a+ 1lb - 2a​

6a-2a = 4a

+ 1lb??

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