Răspuns:
a+b+c=227
a-b=20 => a=b+20
(a+b):c=4 rest 22 => a+b=c×4+22
a+b+c=227
c×4+22+c=227
Adunam c-urile
5×c+22=227
5c= 227-22
5c= 205
c=205:5
c=41
In loc de "c" scriem 41
a+b+41=227
a=b+20
Inlocuim relatia
b+20+b=227-41
2×b+20=186
2b=186-20
2×b= 166
b=166:2
b=83
Aflam a-ul:
a=b+20
a=83+20
a= 103