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a+b=3000
b+c=2000
a+c=5000
urgent


Răspuns :

2a+2b+2c=10000
2*(a+b+c)=10000
a+b+c=5000

3000+c=5000
c=2000

a+2000=5000
a=3000

b=0
2a+2b+2c=10000
2x(a+b+c)=10000
a+b+c=5000
3000+c=5000
c=2000
a+2000=5000
a=3000
b=0 (daca te intreaba este metoda prin algebra)