SOLUTION: In 2005 the international price of gold was $432 per ounce and the international price of silver was $7.35 per ounce. Supposed gold and silver were mixed to obtain 15 ounces of an

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons  -> Linear Equations Lesson -> SOLUTION: In 2005 the international price of gold was $432 per ounce and the international price of silver was $7.35 per ounce. Supposed gold and silver were mixed to obtain 15 ounces of an       Log On


   

Question 947335: In 2005 the international price of gold was $432 per ounce and the international price of silver was $7.35 per ounce. Supposed gold and silver were mixed to obtain 15 ounces of an alloy worth $177.21 per ounce? How much of each was used in the alloy?

Can you solve using systems with 2 variables? Thank you!
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
How much of each was used?
Assign two variables.

g, how much gold
s, how much silver

Account for the mixture price:
432g%2B7.35s=177.21

Account for the amount of mixture, alloy:
g%2Bs=15

You should try to understand how that was made, and then try to solve the two simultaneous equations.