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problema 3.... repede! dau coroana

Problema 3 Repede Dau Coroana class=

Răspuns :

a + b = 3000
b + c = 3800
a + c = 3200
2a + 2b + 2c = 10000
a + b + c = 5000
a = 1200 lei
b = 1800 lei
c = 2000 lei
Hati
1)3000+3800=6800(2*b+a+c)
2*b+3200=6800
2*b=3600
b=3600:2=1800
a=3000-1800
a=1200
c=3200-1200=2000
2)3200+3800=7000(2*c+a+b)
2*c+3000=7000
2*c=7000-3000
2*c=4000
c=4000:2=2000
a=3200-2000=1200
b=3000-1200=1800

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