Răspunsuri

2014-05-14T20:12:27+03:00
Cel mai inteligent răspuns!
2014-05-14T20:13:33+03:00
10x+60=900 / -60
10x=840 / : 10
x= 84
verificare : 10 ori 84+ 60 = 840+60= 900