SOLUTION: A petroleum company has two different sources of crude oil. The first source provides crude oil that is 20% hydrocarbons, and the second one provides crude oil that is 60% hydrocar

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Question 926091: A petroleum company has two different sources of crude oil. The first source provides crude oil that is 20% hydrocarbons, and the second one provides crude oil that is 60% hydrocarbons. In order to obtain 160 gallons of crude oil that is 45% hydrocarbons, how many gallons of crude oil must be used from each of the two sources?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
x = gallons of 20%
y = gallons of 60%
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20x + 60y = 45*160
x + y = 160
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put the system of linear equations into standard form
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20x + 60y = 7200
x + y = 160
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copy and paste the above standard form linear equations in to this solver:
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answer:
x = gallons of 20% = 60
y = gallons of 60% = 100
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