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Sagot :

A=25-7x(-4)+2

= 27 + 28 + 2

= 57

 

b=8x(-4)-6X(-7)

= -32 + 42

=10

 

c =1-10X(-5)+7X(-3)

= 1 + 50 - 21

= 30

 

En espérant t'avoir aidé.

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