Răspunsuri

2014-07-24T22:25:02+03:00
X-pretul initial

15% din x= 15/100*x= 3/20*x= 3x/20 -scumpirea

x+3x/20= (20x+3x)/20= 23x/20-noul pret

23x/20=230

x=20*230/23

x=20*10

x=200
Cel mai inteligent răspuns!
2014-07-24T22:41:07+03:00
A + 15/100 x a = 230
a + 15a /100 = 230
100a + 15a = 23000
115a = 23000
a = 23000/ 115
a = 200 lei - pret initial

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