Răspunsuri

Cel mai inteligent răspuns!
2014-09-30T18:02:16+03:00
3(x+1.3)=7(x+1.1)
3x+3.9=7x+7.7
7x-3x=3.9-7.7
4x=-3.8
x=-3.8/4
x=-0.95
1 5 1