Question

A o reducere de 10% pret ul unui obiect de vine 54 lei

Answer 1

100%-10%=90%
54:90%=60 lei pret initial

Answer 2

$\displaystyle x- \frac{10}{100} \cdot x=54 \\ \frac{100x}{100} - \frac{10x}{100} =54 \\ \frac{90x}{100} =54 \\ 90x=54 \cdot 100 \\ 90x=5400 \\ x= \frac{5400}{90} \\ x=60$