document.write( "Question 160634: Grain worth 65 cents per pound was mixed with grain worth 90 cents per pound to produce 20 pounds of a mixture worth 80 cents per pound. Find how many pounds of each was used \n" ); document.write( "
Algebra.Com's Answer #118445 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! 65x+90(20-x)=80*20 \n" ); document.write( "65x+1800-90x=1600 \n" ); document.write( "-25x=1600-1800 \n" ); document.write( "-25x=-200 \n" ); document.write( "x=-200/-25 \n" ); document.write( "x=8 pounds of 65 cent grain. \n" ); document.write( "20-8=12 pounds of 90 cent grain. \n" ); document.write( "Proof: \n" ); document.write( "65*8+90*12=1600 \n" ); document.write( "520+1080=1600 \n" ); document.write( "1600=1600 \n" ); document.write( " |