👤


a +b=559
b+c=600
a+c=531
află a,b,c.


Răspuns :

a+b=559 
b+c=600
a+c=531
a=531-c
b=600-c

531-c+600-c=559
2c=1131-559
c=572:2
c=286

a=531-286=245
b=600-286=314