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An alloy which weights 118 kilograms is 10% silver.How much silver must be added to produce a metal that is 25% silver?

 Jun 15, 2020
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Let x = kg of silver to be added
11.8 kg of silver in 10% alloy

 

We can make an equation. 11.8+x=0.25(118+x)

 

Simplify it to be 11.8+x=29.5+0.25x

 

Subtract. 0.75x=29.5-11.8

 

Subtract 2:Electric Boogaloo 0.75x=17.7

 

Simplify it to be x=23.6

 

Yay!

 Jun 15, 2020

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