document.write( "Question 126207: I have tried this problem about 10 different ways but I can't seem to get it!! Help!!!\r
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document.write( "A merchant has coffee worth $20 a pound that she wishes to mix with 30 pounds of coffee worth $90 a pound to get a mixture that can be sold for $40 a pound. How many pounds of the $20 coffee should be used? \n" );
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Algebra.Com's Answer #92480 by edjones(8007)![]() ![]() You can put this solution on YOUR website! Let x be the pounds of $20 coffee necessary. \n" ); document.write( ". \n" ); document.write( "30*90=2700 \n" ); document.write( "x *20=20x \n" ); document.write( "(30+x)*40=1200+40x \n" ); document.write( ". \n" ); document.write( "20x+2700=40x+1200 \n" ); document.write( "20x=1500 \n" ); document.write( "x=75 lbs. \n" ); document.write( ". \n" ); document.write( "Check: \n" ); document.write( "75+30=105 lbs \n" ); document.write( "75*20=1500 \n" ); document.write( "1500+2700=4200 \n" ); document.write( "105*40=4200 \n" ); document.write( ". \n" ); document.write( "Ed \n" ); document.write( " |