Question

Aflati pretul initial al unui produs daca, dupa o scumpire cu 15%, costa 460 lei.

Answer 1

115%........460 lei
15%.......x lei
x= 460 x 15 : 115
x= 6900 : 115
x = 60 lei (reducerea)

pret initial= 460 - 60
= 400

Answer 2

$\it Fie\ x- pre\c{\it t}ul\ ini\c{\it t}ial\\ \\ x+\dfrac{15}{100}\cdot x= 460 \Rightarrow \dfrac{115}{100}\cdot x=460 \Rightarrow x=460\cdot\dfrac{100}{115}=\dfrac{46000}{115}=400\ lei$