Răspunsuri

2014-04-01T18:43:41+03:00
2014-04-01T18:47:06+03:00
X,9=x9 in baza 10 /10
x,3=x3 in baza 10/10
7,2=72/10

x9/10+x3/10=72/10
toate sunt supra 10 =>x9+x3=72
10x+9+10x+3=72
20x+12=72
20x=60
x=3