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