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Sa se afle numerelea,b,c stiind ca a+ b=3000,b+c=5000,iar a+c=4000

Răspuns :

Marcela16
2 (a+b+c)=3000+5000+4000
a+b+c=12000÷2
a+b+c=6000
a+b=3000
3000+c=6000 c=6000-3000=3000
b+c=5000 b=5000-3000=2000
a+c=4000 a=4000-3000=1000
1000+2000+3000=6000