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Sagot :

Bonjour,

A)

11 + 2x -12

= 2x -1

B)

-6y +12 -2y

= -8y +12

C)

7 -32 +8a +a

=  9a -25

d)

-15 +45 -27b

= -27b +30

E)

-30 +15z -9 +z

= 16z -39

F)

12x -24 + 12x

= 24x -24

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