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Can someone PLEASE explain how to do this to me? Thank you so much!

Ten gallons of a 30% acid mixture is obtained by mixing a 50% solution (X) with 20% solution (Y). Write an equation for the 10 gallon mixture. What is the acid concentration, in gallons, of the final mixture? Write an equation for the acid concentration.

  • algebra -

    x+y=10 ---- equation #1

    .5x + .2y = .3(10) ---- equation #2

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