juste besoin d'une vérification: x est une lettre

3(-4x+8) + 3x - 4 (2x - 5)= 4x

le résultat est il x= 52/21 ??

-6 (-x +5) + 7 (3x+1)- = 5(x-2)

le résultat est il x= 33/32 ??

merci

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