Răspunsuri

2014-09-21T12:06:04+03:00
X = pret initial
10/100 · x/1 = x/10 lei reducerea
x/1 - x/10 = 1080/1 ( aducem la același numitor)
10x/10 - x/10 = 10800/10 / ·10
9 x = 10800
x = 1200 lei
1200-1080 = 120 lei reducerea.