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Rezolvati in q ecuatiile. a)0,(2)ori(x-1)=1supra patru

Răspuns :

0.(2)=2/9
2/9×(x-1)/1=1/4
(2×x-2)/9=1/4
Aducem la acelasi numitor
8×x-8=9
8×x=17
x=2.125