prima zi:15%*x=y A doua zi:15%*y=z A treia zi:15%*z=q A patra zi:15%*q=27 [tex] \frac{15}{100} *q=27=\ \textgreater \ \frac{3}{20} *q=27 |*20[/tex] [tex]3*20q=540=\ \textgreater \ 20q= \frac{540}{3} =\ \textgreater \ 20q=180=\ \textgreater \ z=9[/tex] 9 televizoare in a 4-a zi [tex] \frac{15}{100} *z=9=\ \textgreater \ \frac{3}{20} *z=9 |*20=\ \textgreater \ 3*20z=180[/tex] [tex]20z= \frac{180}{3} =60=\ \textgreater \ z=3[/tex] 3 televizoare in cea dea 3-a zi [tex] \frac{15}{100} *y=3=\ \textgreater \ \frac{3}{20} *y=3|*20=\ \textgreater \ 3*20y=60=\ \textgreater \ 20y=20=\ \textgreater \ y=1[/tex] 1 televizor in a 2-a zi [tex] \frac{15}{100} *x=1=\ \textgreater \ \frac{3}{20} *x=1|*20=\ \textgreater \ 3*20x=20=\ \textgreater \ 60x=20=\ \textgreater \ [/tex] [tex]=\ \textgreater \ x=3[/tex] 3 televizoare in prima zi total televizoare:zi1+2+3+4=3+1+3+9=7+9=16
