Răspuns :
a+b+c=7644
a+b =4987
___________
c=2657
a+b+c=7644
b+c=5209
___________
a =2435
b=4987-a
b=4987-2435
b=2552
a+b =4987
___________
c=2657
a+b+c=7644
b+c=5209
___________
a =2435
b=4987-a
b=4987-2435
b=2552
7644-4987=2657;deci C=2657;7644-5209=2435;deci A=2435;7644-(2435+2657)
=7644-5092=2552;B=2552
R:C=2657;A=2435;B=2552
=7644-5092=2552;B=2552
R:C=2657;A=2435;B=2552