Răspuns :

Miky93id
x-pretul initial

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

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

11x/10= 220

x=220*10/11

x=200
Petrwid
100%+10%=110%

110%....................220 lei
100%........................ xlei
________________________

x=100x220/110
x=200 lei

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