Răspunsuri

2014-06-21T14:14:58+03:00
X-pretul initial

10% din x=  10/100*x=  1/10*x=  x/10-reducerea

x-x/10= (10x-x)/10=  9x/10 -noul pret

9x/10=54

x=10*54/9
x=10*6
x=60
100% -10%=90% 90% * x = 54 x= (100*54) : 9 x= 60