SOLUTION: How many gallons of cottonseed oil must be added to 45 gallons of a solution of olive oil which is 90% olive oil in order to make the resulting solution 80% olive oil?

Question 1157107: How many gallons of cottonseed oil must be added to 45 gallons of a solution of
olive oil which is 90% olive oil in order to make the resulting solution 80% olive oil?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
X gallons of the cottonseed oil (0% olive oil) to add:

Solve.

As assigned in the analysis shown, X is the amount of the 0% olive oil. The question therefore asks for X. SOLVE THE SHOWN EQUATION FOR X. Most important is to understand how to form that equation.
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