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rezolvati ecuatia!!!

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Răspuns :

(3x+1)/3 -(16-x)/6 -(9x+1)/7 =3, inmultim cu 42

14(3x+1)-7(16-x)-6(9x+1)=126

42x+14-112+7x-54x-6=126

-5x=230

x=-46