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Determina cifrele a,b,c, daca 5abc=2×abc5+1190​

Răspuns :

Lucaselaask

5abc=2×abc5+1190

5000+abc=2•(abc•10+5)+1190

5000+abc=20•abc+10+1190

5000-1200=20•abc - abc

3800=19•abc       /:19

200=abc

abc=200

verificare:

5200=2•2005+1190

5200=4010+1190 (A)

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