Răspuns :
Răspuns:
a= cat cantareste aluna
n= cat cantareste nuca
2a+3n=61
n= a+7
2a+3(a+7)=61
2a+3a+21=61
5a=40=> a=8g
n=8+7=15g
Răspuns:
2a+3n=61
n=a+7
2a+3(a+7)=61
2a+3a+21=61
5a=61-21
a=40:5=>a=8g cantareste o aluna
n=8+7=>n=15 g cantareste o nuca