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Sagot :

VINS

Réponse :

bonsoir

C = ( 8/3 - 2/5 ) : 7/5

  = ( 40/15 - 6/15 ) : 7/5

  = 34 /15 x 5/7

  =  170/ 105

=  34/ 21

Explications étape par étape :

LOULAKAR

Bonsoir,


C = (8/3 - 2/5)/(7/5)

C = [(8 x 5)/(3 x 5) - (2 x 3)/(5 x 3)] x 5/7

C = (40/15 - 6/15) x 5/7

C = 34/15 x 5/7

C = (34 x 5)/(15 x 7)

C = (34 x 5)/(3 x 5 x 7)

C = 34/21

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