document.write( "Question 1009781: A chemist needs to mix 40% solution with a 70% solution to obtain 12 gallons of a 50% solution. How many gallons of each solution should be used? \n" ); document.write( "
Algebra.Com's Answer #625276 by josgarithmetic(39618)\"\" \"About 
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x, how much 40%
\n" ); document.write( "12-x, how much 70%\r
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\n" ); document.write( "\n" ); document.write( "Amount of just the solute, 0.4x+0.7(12-x)
\n" ); document.write( "Amount of solution, 12 gallons\r
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\n" ); document.write( "\n" ); document.write( "\"%2840x%2B70%2812-x%29%29%2F12=50\"
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