SOLUTION: How many grams of metal worth P500 a gram should be mixed with 20 grams of metal worth P320 per gram to produce an alloy worth P400 a gram?

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Question 1011921: How many grams of metal worth P500 a gram should be mixed with 20 grams of metal worth P320 per gram to produce an alloy worth P400 a gram?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
x, how many grams of the P500 metal.

500x%2B20%2A320=%28x%2B20%29%2A400

Look through and study for clear understanding:
One quantity unknown but other known for two-part mixture