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Sagot :

Bonjour,

A= 9/4 - 19/6

= 27/12 - 38/12

= -11/12

B= -2/7 + 8/5

= -10/35 + 56/35

= 46/35

C= 3/8 - 1/4 - 3

= 3/8 - 2/8 - 24/8

= 1/8 - 24/8

= -23/8

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