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Solve the word problem

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jeweler has 7 rings, each weighing 11 g, made of an alloy of 15 percent silver and 85 percent gold. He decides to melt down the rings and add enough silver to reduce the gold content to 70 percent. How much silver should he add? 

  a) Write an equation for the total amount of gold in the mixture. Use sss to represent the amount of silver added. 

Now solve the equation for s.

 
asked Jul 7, 2016 in PRECALCULUS by anonymous
reshown Jul 8, 2016 by goushi

1 Answer

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Step 1:

A jeweler has imagerings, each weight is image.

Total rings weight is image.

Its made of an alloy of image silver and image gold.

He decides to melt down the rings and add enough silver to reduce the gold content to image.

Let, image represent silver.

The equation is image.

Find the how much silver should be added.

Solve the equation.

image

Solution:

image silver should be added to reduce the gold content to image.

answered Jul 9, 2016 by Anney Mentor

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