SOLUTION: A chemist needs 500 ml of a 20% acid and 80% water mix. The chemist combines x ml of a 10% acid and 90% water mix and y ml of a 30% acid and 70% water mix to make the needed 20% a

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A chemist needs 500 ml of a 20% acid and 80% water mix. The chemist combines x ml of a 10% acid and 90% water mix and y ml of a 30% acid and 70% water mix to make the needed 20% a      Log On


   

Question 875044: A chemist needs 500 ml of a 20% acid and 80% water mix. The chemist combines x ml of a 10% acid and 90% water mix and y ml of a 30% acid and 70% water mix to make the needed 20% acid and 80% water mix. Write a linear system that represents the situation.
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
That's a nice way of putting the description.

With enough experience you may quickly form this:
highlight_green%28%2810x%2B30y%29%2F500=20%29 and highlight_green%28x%2By=500%29.
Solve for x and y.

See a complete lesson on this here: Mixing two concentrations for known amount of mixture