Răspunsuri

2014-06-11T23:52:14+03:00
X-pretul initial

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

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 marire

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

66x/50=528

x=50*528/66
x=50*8
x=400
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