SOLUTION: I really need help on this question: A goldsmith has two different alloys of gold. One is 50% and one is 75%. A custom necklace requires 200g of 66% gold. How much of each alloy

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Question 239025: I really need help on this question:
A goldsmith has two different alloys of gold. One is 50% and one is 75%. A custom necklace requires 200g of 66% gold. How much of each alloy is needed to make this.
Answer by scott8148(5880) About Me  (Show Source):
You can put this solution on YOUR website!
let x="grams of 50%", so 200-x="grams of 75%"

(50%)(x) + (75%)(200 - x) = (66%)(200)