Răspuns :
Fie cele trei nr a,b,c
a+b+c=448
b=a+19
b=c-38
c=b+38=a+19+38=a+57
a+a+19+a+57=448
3a+76=448 /-76
3a=372 /:3
a=124
b=143
c=181
a+b+c=448
a,b, c cele 3 numere
b=a+19
a=b-19
b=c-38
c=b+38
inlocuim in suma
b-19+b+b+38=448
3b+19=448
3b=448-19
3b=429
b=429/3
b=143
a=143-19=>b=124
c=143+38=181
a=124,b=143,c=181
verificare
124+143+181=448
a,b, c cele 3 numere
b=a+19
a=b-19
b=c-38
c=b+38
inlocuim in suma
b-19+b+b+38=448
3b+19=448
3b=448-19
3b=429
b=429/3
b=143
a=143-19=>b=124
c=143+38=181
a=124,b=143,c=181
verificare
124+143+181=448