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Sagot :

Bonjour,

A=

15/48 +36/48 + 28/48

= 79/48

B=

-9/7 -( 63/21 +2/21)

= -9/7 - 65/21

= -27/21 -65/21

= -92/21

C=

15/24 - 20/24 + 8/24

= 3/24  =1/8

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