SOLUTION: A gas station owner has 30 gallons of gasoline worth $1.20 per gallon and some worth $1.40 a gallon. How much gallons of the 1.40 brand must the owner mix in ro produce gasoline t

SOLUTION: A gas station owner has 30 gallons of gasoline worth $1.20 per gallon and some worth $1.40 a gallon. How much gallons of the 1.40 brand must the owner mix in ro produce gasoline t

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Question 224839: A gas station owner has 30 gallons of gasoline worth $1.20 per gallon and some worth $1.40 a gallon. How much gallons of the 1.40 brand must the owner mix in ro produce gasoline that costs $1.28 per gallon
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
1.20*30+1.40x=1.28(30+x)
36+1.40x=38.4+1.28x
1.40x-1.28x=38.4-36
.12x=2.4
x=2.4/.12
x=20 gal. of 1.40 gas is used.
Proof:
1.20*30+1.40*20=1.28(30+20)
36+28=1.28*50
64=64
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