Răspunsuri

Cel mai inteligent răspuns!
2014-11-05T17:28:35+02:00
X+6x/5+9x/10+x-12=70
10x+12x+9x+10x-120=700
41x=820
x=820/41=20
marcheaza-l daca e cel mai bun raspuns.multumesc!