Răspunsuri

2014-11-18T21:32:08+02:00
2014-11-18T21:41:10+02:00
X= pretul initial
y=pretul dupa reducere

 y+ 5% *y=79.8 
100y/100 + 5*y/100=79.8
105*y / 100=79.8
y= 100*79.8 /105
y= 76

x- 5% * x=y
x- 5% * x= 76
100x/100 -5x/100 = 76
x= 100*76 / 95
x=80
Rezultat: 80
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