Răspuns :
n+m=317
n=m+27 si inlocuim in prima operatie
m+27+m=317
2m+27=317
2m=317-27
2m=290
m=290/2
m=145
n=145+27
n=172
n=m+27 si inlocuim in prima operatie
m+27+m=317
2m+27=317
2m=317-27
2m=290
m=290/2
m=145
n=145+27
n=172