Răspuns :
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
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
a + 15/100 x a = 230
a + 15a /100 = 230
100a + 15a = 23000
115a = 23000
a = 23000/ 115
a = 200 lei - pret initial
a + 15a /100 = 230
100a + 15a = 23000
115a = 23000
a = 23000/ 115
a = 200 lei - pret initial