document.write( "Question 197383: A special tea blend is made from two varieties of herbal tea, one that costs $4.00/kg and another that costs $2.00/kg. How many kilograms of each type are needed to make 20 kg of a blend worth $2.50/kg? \n" ); document.write( "
Algebra.Com's Answer #148023 by checkley77(12844)\"\" \"About 
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4x+2(20-x)=20*2.50
\n" ); document.write( "4x+40-2x=50
\n" ); document.write( "2x=50-40
\n" ); document.write( "2x=10
\n" ); document.write( "x=10/2
\n" ); document.write( "x=5 kg of the $4 tea is used.
\n" ); document.write( "20-5=15 kg of the $2 tea is used.
\n" ); document.write( "Proof:
\n" ); document.write( "4*5+2*15=50
\n" ); document.write( "20+30=50
\n" ); document.write( "50=50
\n" ); document.write( "
\n" );