SOLUTION: How much of an alloy that is 20% copper should be mixed with 600 ounces of an alloy that is 70% copper in order to get an alloy that is 30% copper?

Question 993597: How much of an alloy that is 20% copper should be mixed with 600 ounces of an alloy that is 70% copper in order to get an alloy that is 30% copper?
Answer by htmentor(1343) (Show Source): You can put this solution on YOUR website!
Let x = the weight of the 20% alloy
Therefore the total weight of the mixture is x + 600
We can write the following equation which equates the amount of copper from each of the two alloys to the total amount contained in the mixture:
0.2x + 0.7*600 = 0.3(x+600)
Solve for x:
0.1x = = 240
x = 2400 oz
Check:
0.2*2400 + 0.7*600 = 480 + 420 = 0.3(3000) = 900
RELATED QUESTIONS
How much of an alloy that is 20% copper should be mixed with 600 ounces of an alloy that... (answered by Fombitz)

how much of an alloy that is 20 copper should be mixed with 600 ounces of an alloy that... (answered by ankor@dixie-net.com)

How much of an alloy that is 20% copper should be mixed with 400 ounces of an alloy that (answered by ankor@dixie-net.com)

how much of an alloy that is 20% copper should be mixed with 600 ounces of an alloy that... (answered by josgarithmetic)

How much of an alloy that is 20% copper should be mixed with 600 ounces of an alloy that... (answered by greenestamps,ikleyn)

how much of an alloy that is 10% copper should be mixed with 500 ounces of an alloy that... (answered by josmiceli)

How much of an alloy that is 20% copper should be mixed with 100 ounces of an alloy that... (answered by Theo)

how much of an alloy that is 30 percent should be mixed with 600 ounces of an alloy that... (answered by stanbon)

How much of an alloy that is 10% copper should be mixed with 600 ounces of an alloy that... (answered by checkley79,solver91311)