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Urgeeent! Dau coroana!!!
Determina numarul natural abc , stiind ca abc+bc+cb+5a=216


Răspuns :

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abc+bc+cb+5a=216
100a+10b+c+10b+c+10c+b+5a=216
105a+21b+12c=216
3
5a+7b+4c=216:3=72
a=
7b+4c=72-35=37
b=3
4c=37-21=16
c=16:4=4

verificare
134+34+43+5×1=168+43+5=211+5=216