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Joshua has a brand of peanut oil, which has 19% oil. Kyle has a brand of olive oil, which has 71% oil. Joshua and Kyle combined their oils and made 1 3/10 quarts of a new oil. If the new oil containes 39% oil, how many quarts of peanut oil did they use?

 Jul 2, 2020
 #1
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Let the amount of peanut oil =  x quarts

 

Then the amount of olive oil  = (1.3  - x)  quarts

 

Then we can solve this equation

 

.19x  + .71 ( 1.3 - x)   = .39 ( 1.3)        simplify

 

.19x + .923 - .71x  = .507

 

(.19x  - 71x)  =  .507 - .923

 

-.52x  = -.416     divide both sides  by  -.52

 

x   =  .8   (quarts  of peanut oil used)

 

 

cool cool cool

 Jul 2, 2020

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