Răspuns :
[tex] \frac{100}{100}x- \frac{10}{100}x=99 [/tex]
[tex] \frac{90}{100}x =99 [/tex]
[tex] \frac{90x}{100} = \frac{9900}{100}|*100 [/tex]
[tex]90x=9900[/tex]
[tex]x = \frac{9900}{90} [/tex]
[tex]x = 110[/tex]
[tex] \frac{90}{100}x =99 [/tex]
[tex] \frac{90x}{100} = \frac{9900}{100}|*100 [/tex]
[tex]90x=9900[/tex]
[tex]x = \frac{9900}{90} [/tex]
[tex]x = 110[/tex]
100%-10%=90%
90%.......................................99 lei
100%......................................x lei
x=100x99:90=110 lei
R: pretul initial a fost de 110 lei
90%.......................................99 lei
100%......................................x lei
x=100x99:90=110 lei
R: pretul initial a fost de 110 lei