Need algebra help for solving a value mixture problem using a system of linear equations

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A petroleum company has two different sources of crude oil.  The 1st source provides crude oil is 70% hydrocarbons, and the 2nd one provides crude oil that is 95% hydrocarbons.  In order to obtain 70 gallons of crude oil that is 75% hydrocarbons, how many gallons of crude oil must be used from each of the two sources

Nov 15th, 2015

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56 gallons of 70% hydrocarbons

14 gallons of 95% hydrocarbons

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Nov 15th, 2015

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Nov 15th, 2015
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Nov 15th, 2015
Jun 27th, 2017
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