27Feb/11Off
Pound Pure
Pound Pure
A scientist has a £ 6 4o% silver alloy. How many pounds of pure silver should he get along with the entire lbs 6?
A scientist has a £ 6 alloy% 4o silver. How many pounds of pure silver should he mix with 6 pounds all the alloy 40% to get as muc of the alloy 63% as he can?
Hello to x number of lbs of pure silver, then 6 * 40 + x * 100 = (6 + x) * 63 240 + 100x = 63x + 378 37x = 138 x = 3.73 lbs Greetings
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