Răspuns :
a+205=723 a=723-205 a=518
a+b=942 518+b=942 b=942-518 b=424
b+c=612 424+c=612 c=612-424 c=188
a+b=942 518+b=942 b=942-518 b=424
b+c=612 424+c=612 c=612-424 c=188
a+205=723
a=723-205
a=518
a+b=942
518+b=942
b=942-518
b=424
b+c=612
424+c=612
c=612-424
c=188
a=723-205
a=518
a+b=942
518+b=942
b=942-518
b=424
b+c=612
424+c=612
c=612-424
c=188