Răspunsuri

2014-10-22T20:39:13+03:00
124+20=144 (pretul inainte de ieftinire)
144..........................................80%
x.............................................100%
x=144*100 ( taie un zero )
    ------------(Supra)
       80(se taie un 0)
x=1440:8
X=180 pret initial 
2014-10-22T20:46:26+03:00
X+x:20%-20=124
x+20x  -20=124
   100
100x+20x-2000=12400
120x=14400
x=120
pretul initial 120 lei