Question 1

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Resol:      begin mathsize 14px style fraction numerator begin bold style negative 7 end style bold space bold x bold minus begin bold style 1 end style over denominator begin bold style 6 end style end fraction bold minus fraction numerator begin bold style 5 end style bold space bold x bold plus begin bold style 4 end style over denominator begin bold style 4 end style end fraction bold equals fraction numerator begin bold style 9 end style bold space bold x bold plus begin bold style 5 end style over denominator begin bold style 2 end style end fraction bold minus fraction numerator begin bold style 3 end style bold space bold x bold minus begin bold style 9 end style over denominator begin bold style 6 end style end fraction end style


Format de la resposta: x=-3/2 

Atenció: el denominador comú és el mcm!
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