Răspuns :
m+n=110
n=m+30
inlocuim in suma n cu m+30
m+ m+30=110
2m=80
m=40
n=40+30=70
verificare: 40+70=110(A)
n=m+30
inlocuim in suma n cu m+30
m+ m+30=110
2m=80
m=40
n=40+30=70
verificare: 40+70=110(A)