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Cel mai inteligent răspuns!
2014-06-04T00:25:54+03:00
A+ a/2 + 2a =140  aducem la acelasi numitor

2a+a+4a=280

7a=280
a=280:7
a=40
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  • Utilizator Brainly
2014-06-04T08:04:24+03:00