- #1
acen_gr
- 63
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The title says it all.
Say you have 5 rings, each weighing 18 grams (10% alloy and 90% gold).
If you would melt them all and add silver to make it 75% gold,
1) how much silver do you have to add?
2) Does melting 5 rings with 18grams each give 90 grams in total?
3) is this equation to solve for this problem right?
let x = amount of silver to add
total grams = 90 g
total grams (.90) + x silver (100%) = total grams + x (.75)
90(.9) + 1x = 90(.75)
81 + x = 67.5 + .75x
x = -54
4) Am I doing/thinking them all wrong?
thanks.
Say you have 5 rings, each weighing 18 grams (10% alloy and 90% gold).
If you would melt them all and add silver to make it 75% gold,
1) how much silver do you have to add?
2) Does melting 5 rings with 18grams each give 90 grams in total?
3) is this equation to solve for this problem right?
let x = amount of silver to add
total grams = 90 g
total grams (.90) + x silver (100%) = total grams + x (.75)
90(.9) + 1x = 90(.75)
81 + x = 67.5 + .75x
x = -54
4) Am I doing/thinking them all wrong?
thanks.