how many ounces of pure silver must be added to five ounces of something that is 1% silver in order that the mixture is 6% silver.

(5*.01+x]/(x+5)=0.06

0.05+x=0.3+0.06X

x=0.25/{1-0.06}=0.25/0.96=26.04

26.04 ouncs 100% Ag