Răspuns:
x - numar apartamente cu 2 camere
y - numar apartamente cu 3 camere
[tex]\left \{ {{x+y=20} \atop {2x+3y=48}} \right. \\\left \{ {{y=20-x} \atop {2x+3(20-x)=48}} \right. \\\left \{ {{y=20-x} \atop {2x+60-3x=48}} \right.\\\left \{ {{y=20-x} \atop {2x-3x=48-60}} \right. \\\left \{ {{y=20-x} \atop {-x=-12}} \right. \\\\\left \{ {{x=12} \atop { y=20-12=8 }} \right. \\[/tex]
12 apartamente cu 2 camere
8 apartamente cu 3 camere