document.write( "Question 1159501: This is a solving a system of equations word problem using matrices !!
\n" ); document.write( "Suppose you bought supplies for a party. Three rolls of streamers and 15
\n" ); document.write( "party hats cost $30. Later, you bought 2 rolls of streamers and 4 party hats for
\n" ); document.write( "$11. How much did each roll of streamers cost? How much did each party hat
\n" ); document.write( "cost?
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Algebra.Com's Answer #782548 by Boreal(15235)\"\" \"About 
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3S+15H=30
\n" ); document.write( "2S+4H=11
\n" ); document.write( "multiply top by -2 and bottom by 3 to eliminate S
\n" ); document.write( "-6S-30H=-60
\n" ); document.write( "6S+12H=33
\n" ); document.write( "-18H=-27
\n" ); document.write( "H=$1.50
\n" ); document.write( "2S=$5
\n" ); document.write( "S=$2.50 substituting into second\r
\n" ); document.write( "\n" ); document.write( "check in first $7.50+$22.50=$30.00\r
\n" ); document.write( "\n" ); document.write( "Each hat cost $1.50
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