SOLUTION: How many liters of a 9% solution of salt should be added to a 19% solution in order to obtain 420 liters of a 15 % solution

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How many liters of a 9% solution of salt should be added to a 19% solution in order to obtain 420 liters of a 15 % solution      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 785363: How many liters of a 9% solution of salt should be added to a 19% solution in order to obtain 420 liters of a 15 % solution
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
One of the very most common mixture exercise problems. Just another example of the same general exercise.

L=9%
T=15%
H=19%
M=420 liters
u=UNKNOWN amount liters of the 9%
v=UNKNOWN amount of liters of 19%

SYSTEM OF EQUATIONS TO SOLVE:
highlight%28%28Lu%2BHv%29%2FM=T%29 and highlight%28u%2Bv=M%29
Solve for u and v.