Question

sa se afle nr a b c stiind ca a+b=3000 b+c=5000 iar a+c=4000

Answer 1

a=3000-b
a=4000-c
3000-b=4000-c
c-b=4000-3000
c+b=5000
c=5000-b
5000-b-b=4000-3000
2b=5000+3000-4000
2b=4000  ,  b=2000
a=1000
c=3000