Question

3. 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 of gold to 98

Answer 1

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