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Sagot :

VINS

Réponse :

bonjour

A = - 2 ( 15/20 + 8/20) + 3/2

A = - 2 * 23/20 + 3 /2

A = - 46/20 + 30/20

A = - 16/20 = - 4/5

B = 4 ( 3/4 + 2/4) - ( 3/6 - 5/6 )

B = 4 ( 5/4 ) - ( - 2/6 )

B = 20/4 + 2/6

B = 60/12 + 4/12

B = 64/12 = 16/3

Explications étape par étape

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