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Réponse :

Explications étape par étape

Bonsoir

A = -9/5 + 7/5

A = -2/5

B = -2,62/27 - 14,5/27

B = -17,12/27

B = -1712/2700

B = -428/675

C = 12/25 + 17/25 - 133/25

C = -104/25

D = 4,5 - 7/8

D = 36/8 - 7/8

D = 29/8

E = -5 - 6/5

E = -25/5 - 6/5

E = -31/5

F = -5/21 - 7/3

F = -5/21 - 49/21

F = -54/21

F = -18/7

G = -2/7 + 3/14

G = -4/14 + 3/14

G = -1/14