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2014-09-04T20:37:34+03:00
X-pretul initial

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

x+x/10= (10x+x)/10=  11x/10-noul pret

10/100 * 11x/10=  10/100 * 11x/10= 1/10 * 11x/10=  11x/100-scaderea

11x/10 -11x/100= (110x-11x)/100=  99x/100 -noul pret

99x/100 = 118 800

x=118 800*100/99

x=1200 *100

x=120000
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