document.write( "Question 97990This question is from textbook
\n" ); document.write( ": A grocer wants to mix peanuts and cashews to produce 20 lb of mixed nuts worth $6.20/lb. How many pounds of each nut should she use if peanuts cost $4.80/lb and cashews cost $8/lb? \n" ); document.write( "
Algebra.Com's Answer #71284 by tutorcecilia(2152)\"\" \"About 
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Let x = peanuts
\n" ); document.write( "Let y=cashews
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\n" ); document.write( "$4.80x + 8y =($20lbs.)($6.80)
\n" ); document.write( "4.80+8y=136
\n" ); document.write( ".
\n" ); document.write( "Let x+y=20lbs
\n" ); document.write( "So, y=20-x
\n" ); document.write( "Than, 4.80x+8(20-x)=136
\n" ); document.write( "4.80x+160-8x=136
\n" ); document.write( "4.80-8x=136-160
\n" ); document.write( "3.20x=24
\n" ); document.write( "3.20x/3.20=24/3.60
\n" ); document.write( "x=7.50
\n" ); document.write( ".
\n" ); document.write( "Since x= 7.50 lbs
\n" ); document.write( "Than, y=20-x=20-x=20-7.50=12.50 lbs
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\n" ); document.write( "Check by plugging all of the values back into the original equation and solve:
\n" ); document.write( "$4.80x + 8y =($20lbs.)($6.80)
\n" ); document.write( "$4.80(7.50 lbs) + ($8)(12.50lbs) = 136
\n" ); document.write( "36+100=136
\n" ); document.write( "136=136 [checks out]\r
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