Question

ntrun bloc sint apatrtamente cu 2 si 4 camere in total sint 140 camere si 45 apartamente . aflati cate apartamente cu 2 si 4 camere sint te rog prin ecuoatie "

Answer 1

x=apartamente cu 2 camere
y=aparatamente cu 4 camere
[tex] \left \{ {{x+y=45} \atop {2x+4y=140}} \right.\ \textless \ =\ \textgreater \ \left \{ {{4x+4y=180} \atop {2x+4y=140}} \right.\\ Le\ scadem :2x/=40=\ \textgreater \ x=20\ apartamente\ cu\ 2\ camere\\ x+y=45\\ 20+y=45=\ \textgreater \ y=25\ apartamente\ cu\ 4\ camere\ [/tex]