Question

dupa o scumpire cu 15% pretul este 345 lei.Aflati pretul initial

Answer 1

Notam :

x-pretul initial

$\frac{15}{100}*x= \frac{3x}{20}$

$x+ \frac{3x}{20}=345$

20x+3x=6 900

$23x=6 900 =\ \textgreater \ x=\frac{6 900}{23} =300$

Answer 2

115%.....345
100%.....x
x=345*100/115=34500/115=300 pretul initial