Răspuns :
x-pretul initial
10% din x= 10/100*x= 1/10*x= x/10 -reducerea
x-x/10=(10x-x)/10= 9x/10-restul
15% din 9x/10= 15/100* 9x/10= 3/20 * 9x/10= 27x/200-noua reducere
9x/10 -27x/200= (180x-27x)/200= 153x/200
153x/200=3060
x=200*3060/153
x=200*20
x=4000lei
10% din x= 10/100*x= 1/10*x= x/10 -reducerea
x-x/10=(10x-x)/10= 9x/10-restul
15% din 9x/10= 15/100* 9x/10= 3/20 * 9x/10= 27x/200-noua reducere
9x/10 -27x/200= (180x-27x)/200= 153x/200
153x/200=3060
x=200*3060/153
x=200*20
x=4000lei
pretul initial era 100%
daca a scazut cu 25% au mai ramas 75%(3060)
3060+1020=4080
daca a scazut cu 25% au mai ramas 75%(3060)
3060+1020=4080