Tema 3

V=20 lei
Umgx=10-x
Umgy=28-2y
Px=1 leu
Py=2 lei
__________
Qx=?
Qy=?
___________
Umgx/Umgy=Px/Py <=>10-x/28-2y=1/2 <=> 20-2x=28-2y <=> -2x-2y=28-20 <=> -2x-2y=8
V=(Px * Qx) + (Py * Qy) <=>20=x+2y <=> x+2y=20
-2x+2y=8            -2x+2y=8
                   <=>
x+2y=20|*2          2x+4y=40
                            _________
                             //   6y=48 => y=48/6=8
<=>y=8                   y=8              y=8               y=8
                       <=>             <=>             <=>
      2x+32=40         2x=8             x=8/2            x=4

Qx=4 , Qy=8

Tema 2

Menaje:individuale- Familia Andronic
            :colective-Centru de plasament

Intreprindere: Veritas Panciu S.A
.
Administratie publica: Primaria Panciu
Administratie privata: Fundatia rrom pentru rrom

Institutie financiara: Banc Post

Problema 1

Problema 1

V=250 lei ; b=blugi,c=camasa,t=tricou
Cop/c=1/3Pb    
Cop/c=4/3Pt

Cop/t=1/4Pb
Cop/t=3/4Pc

Problema 2

5A=2B
Cop/ 1A=2/5B=0.4B
Cop/1B=5/2A=2.5A