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2014-07-08T14:50:14+03:00
A5c9=3x1000+bx100+7x10+d

1000xa +5x100+cx10+9=3x1000+bx100+7x10+d

1000xa=3x1000

a=3

5x100=bx100

b=5

cx10=7x10

c=7

d=9
6 5 6
2014-07-08T15:02:31+03:00
____
a5c9 = 3 * 1000 + b * 100 +  7 * 10 + d
____    ____
a5c9 = 3b7d  

=>  
a = 3  
b = 5  
c = 7  
d = 9
Numarul este:  3579



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