Răspunsuri

2014-07-03T19:13:40+03:00
X/9=30 rest r
restul < 9 = 8, 7, 6, 5, 4, 3, 2, 1
x=9*30+r
x=270+8=278
x=270+1=271
278-271=7
1 5 1