Question

Un magazin face o reducere de 10% la produsele electrocasnice,astfel ca un frigider costa acum 1080 lei.Reducerea a fost de

Answer 1

Fie x pretul frigiderului inainte de reducere.
[tex]x-10\%x=1080 \\ x- \frac{10x}{100} =1080 \\ x- \frac{x}{10} =1080 \\ 10x-x=10800 \\ 9x=10800 \\ x=1200[/tex]
Reducerea  de 10% inseamna $10\%*1200=120 lei$

Answer 2

x-10/100*x=1080
x-x/10=1080 aduci la acelasi numitor
10x/10-x/10=10800/10
9x=10800 dedi s=1200 lei
10/100*1200=1200/10=120 lei reducere