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Rezolvati ecuatiile in multimea indicata 1+2/3*x=1.5+ 1/6*x , x= Q+




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2,5x+3= 9,75 Rezolvati in Q+ ecuatiile


Răspuns :

1+2/3*x=1,5+1/6*x 1+2/3*x=1+2x/3 aducem la acelasi numitor 1*3/3+2x/3=3+2x/3 1,5+1/6*x=15/10+x/6=aducem la acelasi numitor 15*6/6*10+10*x/6*10=90/60+10x/60=90+10x/60 Acum avem 3+2x/3=90+10x/60 60*(3+2x)=3*(90+10x) 180+120x=270+30x 120x-30x=270-180 90x=90=>x=90:90=>x=1 2,5x+3=9,75 2,5x=9,75-3 2,5x=6,75 X=6,75:2,5=>x=675/100:25/10=>x=675/100*10/25=675/10*1/25=675/250se simplifica cu 25=27/10=2,7