Răspuns :
x×(120/100)×(110/100)=264
x×(12/10)×(11/10)=264
x×(132/100)=264
x×132=26400
x=200 lei
x×(12/10)×(11/10)=264
x×(132/100)=264
x×132=26400
x=200 lei
Fie p - pretul initial.
p+20% = p+[tex] \frac{20}{100} [/tex] *p = y
(p+20%)+10% = y+[tex] \frac{10}{100} [/tex]*y
[tex]y+\frac{10}{100}*y = 264 |*10\\ 10y+y=2640 \\ 11y=2640 \\ y=240[/tex]
[tex]p+ \frac{20}{100} *p = y \\ p+ \frac{20}{100} *p = 240 |*10 \\ 10p+2p=2400\\12p=2400\\p=200[/tex]
Pretul initial al bicicletei este 200 lei
p+20% = p+[tex] \frac{20}{100} [/tex] *p = y
(p+20%)+10% = y+[tex] \frac{10}{100} [/tex]*y
[tex]y+\frac{10}{100}*y = 264 |*10\\ 10y+y=2640 \\ 11y=2640 \\ y=240[/tex]
[tex]p+ \frac{20}{100} *p = y \\ p+ \frac{20}{100} *p = 240 |*10 \\ 10p+2p=2400\\12p=2400\\p=200[/tex]
Pretul initial al bicicletei este 200 lei