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Sagot :

MAUDMARINE

Bonjour

(3/8+7/5) ÷ (9/4 - 5/3)​

= [(3 x 5) / (8 x 5) + (7 x 8) / (5 x 8)] : [(9 x 3) / (4 x 3) - (5 x 4) / (3 x 4)]

= (15/40 + 56/40) : (27/12 - 20/12)

= 71/40 : 7/12

= 71/40 x 12/7

= 852/280

= (4 x 213) / (4 x 70)

= 213/70.

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