Răspunsuri

2014-04-03T19:01:41+03:00
65-15=50
50x2=100
100-34=66
66 impartit la 11=6
6+12=18
2014-04-03T20:35:23+03:00
((n-15)x2-34):11+12=18
(2n-30-34):11=18-12
(2n-64):11=6
2n-64=66
2n=66-64
2n=2
n=1