SOLUTION: an alloy of gold and copper weighing 100 gm contains 97 gm of gold. how much gold should be added to the alloy to increase the percentage og gold to 98?
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Question 902157: an alloy of gold and copper weighing 100 gm contains 97 gm of gold. how much gold should be added to the alloy to increase the percentage og gold to 98? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! (97+x)/(100+x)=.98
97+x=.98*(100+x)
97+x=98+.98x
.02x=1
2x=100
x=50
check
97+50/150=147/150=,98
ok
