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  • Utilizator Brainly
2014-04-01T09:45:58+03:00
7/3∈Q ⇒ x/9=7/3 ⇒ x=63/3, x=21;
28/z=7/3 ⇒ z=84/7, z=12;
(y+4)/y=7/3 ⇒ 7y=3(y+4) ⇒ 4y=12 ⇒ y=3
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