SOLUTION: a dealer has 400 gallons of low octane gasoline worth $1.29 a gallon. How many gallons of high octane gasoline worth $1.35 a gallon should he blend with the low octane gasoline sa

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Question 729345: a dealer has 400 gallons of low octane gasoline worth $1.29 a gallon. How many gallons of high octane gasoline worth $1.35 a gallon should he blend with the low octane gasoline sa as to produce a mixture wirth $1.31 a gallon?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
u = amount of low strength material, 400 gallons
v = amount of high strength material, unknown gallons
L = concentration (of money) of low strength material, $1.29/gallon
H = concentration (of money) of high strength material, $1.35/gallon
T = concentration (OF MONEY) of mixture, $1.31/gallon

EQUATION TO RELATE THE QUANTITIES
highlight%28%28uL%2BvH%29%2F%28u%2Bv%29=T%29
Solve for v, and then substitute values to evaluate the formula of v.