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Sagot :

Bonjour,

A=

7/3 - 4/3 * 5/8

= 7/3 - 20/24

=  56/24 - 20/24

=  36/24

= 6/4= 3/2

B=

( -4/45)/(3/7)

= -4/45 * 7/3

=  -28/ 135

C=

-8/3 * -6/5 +7/4

= 48/15 +7/4

= 16/5 +7/4

= 64/20+ 35/20

= 99/20

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