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Problema 5 de la pagina 113.

Problema 5 De La Pagina 113 class=

Răspuns :

a+b=210
a-a/6=2(b+a/6)
5a/6=2b+2a/6
5a/6-2a/6=2b
3a/6=2b
a/2=2b=>a=4b
b=210-a
a=4(210-a)
a=840-4a
5a=840=>a=840:5=>a=168 lei Andrei
b=210-168=>b=42 lei Bogdan