SOLUTION: How many ounces of a metal other than gold must be added to 56 ounces of pure gold to make a composition 70% gold?
Algebra.Com
Question 208984: How many ounces of a metal other than gold must be added to 56 ounces of pure gold to make a composition 70% gold?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
How many ounces of a metal other than gold must be added to 56 ounces of pure
gold to make a composition 70% gold?
:
Let x = amt of metal to be added
:
Write an "amt of gold" equation
56 = .7(x+56)
56 = .7x + 39.2
56 - 39.2 = .7x
16.8 = .7x
x =
x = 24 oz of metal
;
:
Check solution
.7(24+56) = 56
RELATED QUESTIONS
Gold coin is usually 90% gold and 10% copper. How many ounces of pure gold (24K) must be... (answered by TimothyLamb)
How many ounces of pure gold must be added to five ounces of something that is 1% gold in (answered by ankor@dixie-net.com,stanbon,ptaylor)
How many ounces of pure gold must be added to five ounces of something that is 1 percent... (answered by josmiceli)
How many ounces of pure gold must be added to five ounces of something that is 1 % gold... (answered by cutepiscean5)
How many ounces of pure gold must be added to five ounces of something that is 1% gold in (answered by Fombitz)
Gold coin is usually 90% gold and 10% copper. How many ounces of pure gold (24K) must be... (answered by TimothyLamb,MathTherapy)
a goldsmith has two alloys of gold, the first being 70% pure and the second being 60%... (answered by Fombitz)
A goldsmith has two alloys of gold, the first being 70% pure and the second being 60%... (answered by stanbon)
a goldsmith has two alloys of gold, the first being 70% pure and the second being 60%... (answered by Alan3354)