a+b=500
[tex] \frac{a}{2}= \frac{b}{4}: \frac{2}{1} => \frac{a}{2}= \frac{b}{8} => a = \frac{2b}{8} = \frac{b}{4} [/tex]
Inlocuim in prima ecuatie:
[tex] \frac{b}{4} + \frac{b}{1}= \frac{500}{1} [/tex]
Amplificam cu 4
[tex]b+4b=2000=>5b=2000/:5 => b=400;a= 100[/tex]
METODA FIGURATIVA:
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Total : 500
500 : 10 = 50 .
50 x 2 = 100 - Primul numar
500 - 100 = 400 - Al doilea numar
