SOLUTION: A petroleum company has two different sources of crude oil. The first source provides crude oil that is 45% hydrocarbons, and the second one provides crude oil that is 95% hydroc

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Question 928936: A petroleum company has two different sources of crude oil. The first source provides crude oil that is 45% hydrocarbons, and the second one provides crude oil that is
95% hydrocarbons. In order to obtain 140 gallons of crude oil that is 55% 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 + y = 140
45x + 95y = 55*140
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put the system of linear equations into standard form
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x + y = 140
45x + 95y = 7700
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = first source = 112 gal
y = second source = 28 gal
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