Question

Va rog ajutați-mă dau 50 de puncte

Answer 1

[tex] \\ \\ 1. x-banii-Anei \\ y-banii-Mariei \\ x=2y \\ x=? \\ y=? \\ \left \{ {{x=2y} \atop {x+y=456}} \right. \\ \left \{ {{x=2y} \atop {2y+y=456}} \right. \\ \left \{ {{x=2y} \atop {3y=456}} \right. \\ =\ \textgreater \ y=152euro \\ =\ \textgreater \ x=152*2=304euro \\ 2. (10+5)-[(7*1,5)+(5*0,75)]= \\ =15-(10,5+3,75)=15-14,25=0,75lei(75bani) \\ 3.x-sezlong-uri \\ y-umbrele \\ 12mese \\ x=4y=\ \textgreater \ x+y+12=113=\ \textgreater \ x+y=101=\ \textgreater \ 4y+y=101 \\ =\ \textgreater \ 5y=101=\ \textgreater \ 101- nu- se- imparte- la- 5[/tex]