Răspunsuri

2014-04-23T09:05:58+03:00
X-nr
16% din x=  16/100 *x= 8/50*x=  4x/25-marirea
x+4x/25=   25x+4x/25=  29x/25-noul nr
16 % din 29x/25=   16/100 *29x/25= 4/25 *29x/25= 116x/625-reducerea 
29x/25-116x/625=725x-116x/625=   609x/625
x-16=  609x/625
625x-10 000=609x
625x-609x=10 000
16x=10 000
x=625 
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