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Aduci la acelasi numitor :
2x-(1/3)x=0,75-1/2
2x-(x/3)=75/100-1/2
(6x-x)/3=(75-50)/100
5x/3=25/100
5x/3=1/4
5x·4=3
20x=3
x=3/20
x=0,15