AFLATI CIFRELE a,b,c,d.STIIND CA a5c9=3x1000+bx100+7x10+d

Răspuns :

a5c9=a×1000+5x100+c×10+9
a×1000+5x100+c×10+9=3×1000+bx100+7×10+d=
a=3
b=5
c=7
d=9
[tex]3\cdot1000+b\cdot10+7\cdot10+d=\overline{3b7d}\\ \overline{a5c9}=\overline{3b7d}\Rightarrow d=9,c=7,b=5,a=3[/tex]