SOLUTION: A Christmas tree supplier mixes gasoline and oil to make 2 gallons of mixture for his 2-cycle chain saw engine. This mixture is 32 parts gasoline and 1 part oil. How much gasolin

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Question 173392: A Christmas tree supplier mixes gasoline and oil to make 2 gallons of mixture for his 2-cycle chain saw engine. This mixture is 32 parts gasoline and 1 part oil. How much gasoline must be added to bring the mixture to 40 parts gasoline and 1 part oil?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the amount of gasoline added......the amount of oil must stay the same on the new mixture so
:
%281%2F33%29%282%29=%281%2F41%29%282%2Bx%29
:
2%2F33=%282%2Bx%29%2F41
:
2%2841%29=33%282%2Bx%29
:
82=66%2B33x
:
33x=16
:
highlight%28x=16%2F33%29gal of gasoline to make 40 parts gasoline and 1 part oil
: