SOLUTION: A forester is making a gasoline-oil mixture for a chainsaw engine. The forester has 3 gallons of a mixture that is 31 parts gasoline and 1 part oil. How many gallons of gasoline sh

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A forester is making a gasoline-oil mixture for a chainsaw engine. The forester has 3 gallons of a mixture that is 31 parts gasoline and 1 part oil. How many gallons of gasoline sh      Log On


   

Question 1019369: A forester is making a gasoline-oil mixture for a chainsaw engine. The forester has 3 gallons of a mixture that is 31 parts gasoline and 1 part oil. How many gallons of gasoline should the forester add to bring the mixture to 47 parts gasoline and 1 part oil? (Round your answer to two decimal places.)
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
Focus on the concentration of the gasoline.
Let v be how much of the gasoline to add.

Do you understand and KNOW HOW to form this equation?
%283%2831%2F%2831%2B1%29%29%2Bv%29%2F%28v%2B3%29=47%2F%2847%2B1%29