Răspuns :
a+b+c=7521
a+b=5825
b+c=5154
Aflam necunoscuta c:
5825+c=7521
c=7521-5825
c=1696
Aflam necunoscuta a:
a+5154=7521
a=7521-5154
a=2367
Aflam necunoscuta b:
2367+b+1696=7521
2367+b=7521-1696
2367+b=5825
b=5825-2367
b=3458
Proba:
a+b+c=
2367+3458+1696=7521
a+b=5825
b+c=5154
Aflam necunoscuta c:
5825+c=7521
c=7521-5825
c=1696
Aflam necunoscuta a:
a+5154=7521
a=7521-5154
a=2367
Aflam necunoscuta b:
2367+b+1696=7521
2367+b=7521-1696
2367+b=5825
b=5825-2367
b=3458
Proba:
a+b+c=
2367+3458+1696=7521