How many grams silver is added to 13 grams gold to produce 85% gold alloy?
This will get it but make sure you read through the whole thing. My first substitution was incorrect. Follow the second part of the thread.
http://www.jiskha.com/display.cgi?id=1443186828
To determine how many grams of silver are added to 13 grams of gold to produce an 85% gold alloy, we need to calculate the amount of gold in the resulting alloy and then subtract it from the total weight of the alloy.
Step 1: Calculate the weight of gold in the resulting alloy:
Since the target percentage of gold in the alloy is 85%, we can calculate the weight of gold by multiplying the total weight of the alloy by the decimal equivalent of 85% (0.85).
Weight of gold = 13 grams * 0.85 = 11.05 grams
Step 2: Determine the weight of silver in the resulting alloy:
To find the weight of silver added to the gold, subtract the weight of gold in the alloy from the total weight of the alloy.
Weight of silver = Total weight of alloy - Weight of gold
Weight of silver = 13 grams - 11.05 grams
Weight of silver = 1.95 grams
So, 1.95 grams of silver is added to 13 grams of gold to produce an 85% gold alloy.