SOLUTION: A radiator specialist needs 10 gallons of a solution of 50% antifreeze. He has a container of 90% antifreeze and he has a container of 40% antifreeze. How many gallons of eac

Algebra ->  Linear-equations -> SOLUTION: A radiator specialist needs 10 gallons of a solution of 50% antifreeze. He has a container of 90% antifreeze and he has a container of 40% antifreeze. How many gallons of eac      Log On


   



Question 144039: A radiator specialist needs 10 gallons
of a solution of 50% antifreeze. He has
a container of 90% antifreeze and he has
a container of 40% antifreeze. How many
gallons of each solution should he use
to mix together to get 10 gallons of 50% antifreeze

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x="gallons of 90%", so 10-x="gallons of 40%"

(90%)(x)+(40%)(10-x)=(50%)(10) __ multiplying by 10 and distributing __ 9x+40-4x=50

subtracting 40 __ 5x=10 __ x=2