Răspuns :
Notam cele trei numere cu A B C
A+B+C= 70
A=36
B=15
Suma AB:36+15=51
Aflam C:70-51=19
Verificare:
A+B+C= 70
36+15+19=70
A+B+C= 70
A=36
B=15
Suma AB:36+15=51
Aflam C:70-51=19
Verificare:
A+B+C= 70
36+15+19=70