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Cel mai inteligent răspuns!
2014-04-27T16:09:51+03:00

a) 2,7+2x<7,9⇒2x<7,9-2,7⇒2x<5,2⇒x<2,6

b)5(2x-0,5)≤7,5⇒10x-2,5≤7,5⇒10x≤7,5+2,5⇒10x≤10⇒x≤10/10⇒x≤1

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