Question

An alloy that is 50% silver is mixed with 500g of a 5% silver alloy. How much of the 50% alloy must be used to obtain an alloy that is 20% silver?

Step 1

Let *x* be the unknown quantity of 50% silver. The silver concentrations will be 0.5x of actual silver, added to 5% silver in 500g or 0.05(500)g of actual silver.

Totaling to (500+x)g of 20% silver which will have 0.2(500+x)g of silver

Your equation is: **0.5x + 0.05(500) = 0.2(500+x)**

Step 2

Solve for *x* to find the amoun...

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