Răspunsuri

2014-06-13T12:17:22+03:00
X-pretul initial

10% din x= 10/100 *x= 1/10 * x=x/10-prima scumpire

x+x/10= (10x+x)/10 =11x/10 -noul pret

20% din 11x/10= 20/100 * 11x/10= 1/5 *11x/10=  11x/50 -a 2a scumpire

11x/10 + 11x/50 = (55x+11x)/50 = 66x/50 -noul pret 

66x/50 =660

x=50*660/66
x=50*10
x=500
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