document.write( "Question 4692: USING A COMBINATION OF 24% NITROGEN AND 12% NITROGEN TO ACHIEVE AN END RESULT OF 100 GRAMS OF 21% NITROGEN. \n" ); document.write( "
Algebra.Com's Answer #2209 by Earlsdon(6294)\"\" \"About 
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Set up your problem this way:\r
\n" ); document.write( "\n" ); document.write( "Assign the variable(s):
\n" ); document.write( "Let x = # of grams of 24% nitrogen and 100 - x = # of grams of 12% nitrogen.
\n" ); document.write( "Convert the percents to decimals.\r
\n" ); document.write( "\n" ); document.write( "x(.24)+ (100 - x)(.12) = 100((.21) Simplify.
\n" ); document.write( ".24x + 12 - .12x = 21
\n" ); document.write( ".12x = 9
\n" ); document.write( "x = 9/(.12)
\n" ); document.write( "x = 75 grams\r
\n" ); document.write( "\n" ); document.write( "100 - x = 100 - 75 = 25 grams\r
\n" ); document.write( "\n" ); document.write( "You would need 75 grams of 24% nitrogen plus 25 grams of 12% nitrogen to achieve a mixture of 100 grams of 21% nitrogen.
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