SOLUTION: a pharmacist wishes to mix a solution that is 2% Minoxidil. She has on hand 80 ml of a 1% solution and wishes to add some 4% solution to obtain the desired 2% solution. How much so

Question 627029: a pharmacist wishes to mix a solution that is 2% Minoxidil. She has on hand 80 ml of a 1% solution and wishes to add some 4% solution to obtain the desired 2% solution. How much solution should she add?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
a pharmacist wishes to mix a solution that is 2% Minoxidil. She has on hand 80 ml of a 1% solution and wishes to add some 4% solution to obtain the desired 2% solution. How much solution should she add?
.
Let x = amount (ml) of 4% solution to add
then
.01(80) + .04x = .02(x+80)
.8 + .04x = .02x+1.6
.8 + .02x = 1.6
.02x = .8
x = 40 ml

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