SOLUTION: 20 gallons of gasoline cost $42. find the coast of 7 gallons. set up proportion and solve

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Question 964356: 20 gallons of gasoline cost $42. find the coast of 7 gallons. set up proportion and solve
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
20X=42.00
X=42.00/20
X=$2.10 PER GALLON.PROOF:
20*2.10=$42.00