Je n'arrive pas à résoudre ces calculs:
(2/3x-8)(7-4/5x)

(1/7-1/6)×2+1/3

-3/75+2/50×2

5/3+2/3÷2/5-1/7

5/3/2

-7/4/3/-5

Merci d'avance!
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