document.write( "Question 553642: One day a store sold 21 sweatshirts. White ones cost $11.95 and yellow ones cost $13.50. In all $268.00 worth of sweatshirts were sold. How many of each color were sold? \n" ); document.write( "

Algebra.Com's Answer #360968 by mananth(16946) $\"\"$ $\"About$

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white x numbers
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\n" ); document.write( "1 x + 1 y = 21 .............1
\n" ); document.write( "11.95 x + 13.5 y = 268 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by 13.5
\n" ); document.write( "Multiply (2) by -1
\n" ); document.write( "13.5 x 13.5 y = 283.5
\n" ); document.write( "-11.95 x -13.5 y = -268
\n" ); document.write( "Add the two equations
\n" ); document.write( "1.55 x = 15.5
\n" ); document.write( "/ 1.55
\n" ); document.write( "x = 10
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "1 x + 1 y = 21
\n" ); document.write( "10 + 1 y = 21
\n" ); document.write( " 1 y = 21
\n" ); document.write( " 1 y = 11
\n" ); document.write( " y = 11
\n" ); document.write( "white 10 numbers
\n" ); document.write( "yellow 11 numbers
\n" ); document.write( "m.ananth@hotmail.ca
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