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)![]() ![]() ![]() You can put this solution on YOUR website! 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. \n" ); document.write( " |