Question

Ex:5,6

Sau coroana!!!

Va rog!!!!!

Answer 1

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