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clearly define variables. set up the equations.How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol?
x represents?
y represents?
equation 1?
equation 2?

  • math -

    amount of 30% solution --- x gal
    amount of 14% stuff ------ 60-x

    solve for x

    .30x + .14(60-x) = .20(60)



    or if you want two variables:

    x+y = 60
    .30x + .14y = .20(60)

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