Question

Dupa doua majorari consecutive de preturi prima cu 3% si a doua cu 5% un obiect costa 86.52 lei. Care a fost pretul initial?

Answer 1

x+3%*x+5%(x+3%x)=86,52
x+$\frac{3x}{100} + \frac{1}{20} (x+ \frac{3x}{100} )=86,52$
$\frac{100x+3x}{100} + \frac{1}{20} * \frac{103x}{100} =86,52$
[tex] \frac{2060x+103x}{2000} =86,52 [/tex]
$\frac{2163x}{2000} =96,52$
2163x=173040
x=80