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Sagot :

AYUDA

bjr

29

3/5 = 3x7 / 5x7 = 21/35

3/4 = 3x15 / 4x15 = 45/60

80/100 = 80:20 / 100:20 = 4/5

49/21 = 49:7 / 21:7 = 7/3

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