Răspuns :
[tex]Raspuns:\\
x-pretul~initial\\
15~la~suta~ 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.[/tex]
230 : 1,15 = 200 LEI [PRET INITIAL
SAU
230 : 115 * 100 = 2 * 100 = 200 LEI
SAU
230 : 115 * 100 = 2 * 100 = 200 LEI