math

posted by .

An 80% acid solution is to be mixed with a 30% solution to get 90 gallons of a 50% solution. How many gallons of each solution are needed?

  • math -

    0.8x + 0.3(90-x) = .5(90)

    .8x + 27 -.3x = 45
    .5x +27 = 45
    .5x + 27 - 27 = 45-27

    .5x = 18
    x = 36

    36 at 80%
    54 at 30%

  • math -

    Kuai, you are awesome!!! Thank you very much! I really appreciate it!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    How many gallons of distilled water must be mixed with 50 gallons of a 30% alchohol solution to get a 25% solution?
  2. math

    How much pure acid should be mixed with 3 gallons of a 50% acid solution in order to get an 80% acid solution?
  3. Math

    How do you solve for this:how many gallons of a 10% alcohol solution be mixed with 20 gallons of a 10% acid solution to obtain an 8% acid solution.
  4. Math

    A 30% solution of fertilizer is to be mixed with a 60% solution of fertilizer in order to get 150 gallons of 50% solution. How many gallons of the 30% and the 60% solutions should be mixed. I really need help.
  5. MATH

    Solution A is 25% and solution B is 40% acid. How many gallons of each solution must be used in order to create a 50 gallon mixture that is 34% acid?
  6. Math

    How many gallons of 15% iodine solution should be mixed with 40% iodine solution to make 100 gallons of a 20% solution?
  7. math

    How many gallons of 5% acid solution should be mixed with 20 galllons of a 10% acid solution to obtain an 8% acid solution
  8. MATH word prob!

    how many gallons of 70% alcohol solution must be mixed with 30 gallons of 23% solution to obtain a solution that is 60% alcohol?
  9. math

    A 70% acid solution is to be mixed with a 40% solution. How many gallons of each solutions are needed?
  10. Algebra 1

    A restaurant has one type of lemonade that has 12% sugar and another that is 7% sugar. How many gallons of each does the restaurant need to make 20 gallons of a lemonade mixture that is 10% sugar?

More Similar Questions