document.write( "Question 807284: how many pounds of coffee worth $9 a pound should be added to 30 pounds of coffee worth $3 a pound to get a mixture worth $4 a pound \n" ); document.write( "
Algebra.Com's Answer #486247 by stanbon(75887)\"\" \"About 
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how many pounds of coffee worth $9 a pound should be added to 30 pounds of coffee worth $3 a pound to get a mixture worth $4 a pound
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\n" ); document.write( "Equation:
\n" ); document.write( "value + value = value
\n" ); document.write( "9x + 3*30 = 4(x+30)
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\n" ); document.write( "9x + 90 = 4x + 120
\n" ); document.write( "4x = 30
\n" ); document.write( "x = 7.5 lbs (amt. of $9 coffee to add)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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