Răspunsuri

Cel mai inteligent răspuns!
2014-10-19T10:52:11+03:00
2(3x+1)-5=156x+2-5=15
6x+2=15+5
6x+2=20
6x=20-2
6x=18
x=18:6
x=3

2014-10-19T11:28:11+03:00
2*(3*x+1)-5=15
2*(3*x+1)=15+5
2*(3*x+1)=20
3*x+1=20:2
3*x+1=10
3*x=9
    x=9:3
     x=3