Răspuns:
a+b+c=256
b=a-37=>a=b+37
b=c+87=>c=b-87
b+37+b+b-87=256
3b=256-37+87
b=306:3=102
a=102+37=139
c=102-87=15
____________
a+b+c=220
(a+b)-c=44=>a+b=44+c
(b+c)-a=102=>b+c=102+a
44+c+c=220
2c=220-44
c=176:2
c=88
a+102+a=220
2a=220-102
a=118:2
a=59
59+b+88=220
b=220-147
b=73
