SOLUTION: How much of a 4% pesticide solution must be added to 20 gallons of a 12% pesticide solution to dilute it to a 10% solution?

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Question 178549This question is from textbook Intermediate Algebra
: How much of a 4% pesticide solution must be added to 20 gallons of a 12% pesticide solution to dilute it to a 10% solution? This question is from textbook Intermediate Algebra

Answer by solver91311(24713) About Me  (Show Source):
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Twelve percent of 20 gallons plus four percent of some unknown amount must equal ten percent of 20 gallons plus that unknown amount.



Just solve for x. (Hint: Start by multiplying both sides by 100 to get rid of those pesky and sometimes confusing decimal fraction coefficients)