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?

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) (Show Source): You can put this solution on YOUR website!

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)

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