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9x+18y=200*14

x+y=200

y=200-x

9x+18(200-x)=2800

9x+3600-18x=2800

-9x=-800

x=88.9 grams

y=111.1 grams

x= 9 karat gold

y=18 karat gold

Answer: 88.9 grams of 9 karat gold must be mixed with 18 karat gold to produce 200 grams of 14 karat gold.

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Q: How many grams of 9 karat gold must be mixed with 18 karat gold to produce 200 grams of 14 karat gold?
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