Răspunsuri

2014-09-20T18:57:24+03:00
1) a=1,2,3,4,5,6,7,8,9
    b=0,1,2,3,4,5,6,7,8,9 deci avem 9x10=90 de numere
2)a+b+c=7
2a+2b+2c=2x7
2a+2b+2c=14
b) 10a+10b+10c= 10x7
     10a+10b+10c=70
c)vei transforma a+b+c in 7 si rezulta 13x7+21=112