document.write( "Question 993419: How much 60% antifreeze solution and 30% antifreeze solution should be combined to give 55 gallons of 42% antifreeze solution? Thank you! \n" ); document.write( "

Algebra.Com's Answer #612725 by MathTherapy(10552) $\"\"$ $\"About$

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\n" ); document.write( "How much 60% antifreeze solution and 30% antifreeze solution should be combined to give 55 gallons of 42% antifreeze solution? Thank you!
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Let the amount of 60% solution to mix, be S
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document.write( "Then the amount of 30% solution to be mixed = 55 - S
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document.write( "The following antifreeze-solution equation is thus formed:
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document.write( ".6S + .3(55 - S) = .42(55)
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document.write( ".6S + 16.5 - .3S = 23.1
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document.write( ".6S - .3S = 23.1 - 16.5
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document.write( ".3S = 6.6
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document.write( "S, or amount of 60% solution to mix = , or  gallons
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document.write( "Amount of 30% solution to be mixed = 55 - 22, or  gallons \n" );
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