SOLUTION: A scientist wants a 90-ounce acid solution with a concentration of 12%. She has concentrations of 8% and 18%. How much of each solution must she use to get the desired concentratio

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A scientist wants a 90-ounce acid solution with a concentration of 12%. She has concentrations of 8% and 18%. How much of each solution must she use to get the desired concentratio      Log On


   

Question 1119722: A scientist wants a 90-ounce acid solution with a concentration of 12%. She has concentrations of 8% and 18%. How much of each solution must she use to get the desired concentration?

Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
"90-ounce"?
?


x of the 8%
90-x of the 18%


8x%2B18%2890-x%29=12%2A90
Solve.