document.write( "Question 339003: A discount store sold plastic cups for $3.25 each and ceramic cups for $4.50 each.
\n" ); document.write( "a. If 500 cups were sold for a total of $2,090, how many cups of each type were sold?
\n" ); document.write( "What was the dollar value of each type of cup sold?
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Algebra.Com's Answer #242998 by mananth(16946)\"\" \"About 
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plastic cups for $3.25 each : let the numberof cups be x
\n" ); document.write( "and ceramic cups for $4.50 each : this will be 500-x cups
\n" ); document.write( "500 cups were sold for a total of $2,090,
\n" ); document.write( "..
\n" ); document.write( "3.25x+4.5(500-x)=2090
\n" ); document.write( "3.25x+2250-4.5x= 2090
\n" ); document.write( "-1.25x=2090-2250
\n" ); document.write( "-1.25x=-160
\n" ); document.write( "divide by -1.25
\n" ); document.write( "x=-160/-1.25
\n" ); document.write( "x= 128 plastic cups.
\n" ); document.write( "remaining will be ceramic cups
\n" ); document.write( "500-128=372
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