Question

Dupa doua cresteri consecutive de preturi, prima de 10%, a doua de 15% , un obiect costa 227,7lei. Afla pretul initial al obiectului.

Answer 1

[tex]x=pretul initial\\ x+\frac{10x}{100}+\frac{15}{100}(x+\frac{10x}{100})=227,7\\ x+\frac{x}{10}+\frac{3}{20}*\frac{110x}{100}=227,7\\ \frac{11x}{10}+\frac{33x}{200}=227,7|*200\\ 220x+33x=45540\\ 253x=45540=\ \textgreater \ x=180 lei[/tex]