Răspuns :
p+m=77
m-17=p si inlocuim in prima relatie
----------------
m-17+m=77
2m=77+17
2m=94
m=94:2=47 kg mandarine
p=47-17=30 kg portocale
----------------------
Verificare: 47+30=77 kg in total, corect.
p+m=77
m-17=p si inlocuim in prima relatie
----------------
m-17+m=77
2m=77+17
2m=94
m=94:2=47 kg mandarine
p=47-17=30 kg portocale
----------------------
Verificare: 47+30=77 kg in total, corect.