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Sagot :

Bonsoir,
A=140 =140/5 = 28
135 135/5 27

B=190 = 190/5 = 38 = 38
315 315/5 63 63

Bonjour !

A = 140/135

A = (28*5) / (27/5)

A = 28/27

B = 190/315

B = (38*5) / (63*5)

B = 38/63

J'espère t'avoir aidé. Bon courage  !

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